diff --git a/appveyor.yml b/appveyor.yml
index b7236e144..aecace548 100644
--- a/appveyor.yml
+++ b/appveyor.yml
@@ -75,32 +75,32 @@ build_script:
 # examples
 - cd %ROOT_DIRECTORY%\examples
 - if defined bjam (
-  b2.exe --hash openssl-version=pre1.1 warnings-as-errors=on -j2 %compiler% address-model=%model% picker-debugging=on invariant-checks=full variant=%variant% %linkflags% %include% link=shared crypto=%crypto%
+  b2.exe --hash openssl-version=pre1.1 warnings=all warnings-as-errors=on -j2 %compiler% address-model=%model% picker-debugging=on invariant-checks=full variant=%variant% %linkflags% %include% link=shared crypto=%crypto%
   )
 
 # tools
 - cd %ROOT_DIRECTORY%\tools
 - if defined bjam (
-  b2.exe --hash openssl-version=pre1.1 warnings-as-errors=on -j2 %compiler% address-model=%model% picker-debugging=on invariant-checks=full variant=%variant% %linkflags% %include% link=shared crypto=%crypto%
+  b2.exe --hash openssl-version=pre1.1 warnings=all warnings-as-errors=on -j2 %compiler% address-model=%model% picker-debugging=on invariant-checks=full variant=%variant% %linkflags% %include% link=shared crypto=%crypto%
   )
 
 # test
 - cd %ROOT_DIRECTORY%\test
 - if defined bjam (
-  b2.exe --hash openssl-version=pre1.1 warnings-as-errors=on -j2 %compiler% address-model=%model% picker-debugging=on invariant-checks=full variant=%variant% %linkflags% %include% link=shared crypto=%crypto% win-tests test_upnp test_natpmp testing.execute=off
+  b2.exe --hash openssl-version=pre1.1 warnings=all warnings-as-errors=on -j2 %compiler% address-model=%model% picker-debugging=on invariant-checks=full variant=%variant% %linkflags% %include% link=shared crypto=%crypto% win-tests test_upnp test_natpmp testing.execute=off
   )
 
 # python binding
 - cd %ROOT_DIRECTORY%\bindings\python
 # we use 64 bit python builds
 - if defined python (
-  b2.exe --hash openssl-version=pre1.1 warnings-as-errors=on -j2 %compiler% address-model=%model% picker-debugging=on invariant-checks=full variant=%variant% %linkflags% %include% link=shared crypto=%crypto% libtorrent-link=shared stage_module stage_dependencies
+  b2.exe --hash openssl-version=pre1.1 warnings=all warnings-as-errors=on -j2 %compiler% address-model=%model% picker-debugging=on invariant-checks=full variant=%variant% %linkflags% %include% link=shared crypto=%crypto% libtorrent-link=shared stage_module stage_dependencies
   )
 
 # simulations
 - cd %ROOT_DIRECTORY%\simulation
 - if defined sim (
-  b2.exe --hash openssl-version=pre1.1 warnings-as-errors=on -j2 %compiler% address-model=%model% debug-iterators=off picker-debugging=on invariant-checks=full test_debug %linkflags% %include% boost-link=default link=static crypto=built-in define=BOOST_ASIO_DISABLE_IOCP testing.execute=off
+  b2.exe --hash openssl-version=pre1.1 warnings=all warnings-as-errors=on -j2 %compiler% address-model=%model% debug-iterators=off picker-debugging=on invariant-checks=full test_debug %linkflags% %include% boost-link=default link=static crypto=built-in define=BOOST_ASIO_DISABLE_IOCP testing.execute=off
   )
 
 # minimal support for cmake build
@@ -115,7 +115,7 @@ build_script:
 test_script:
 - cd %ROOT_DIRECTORY%\test
 - if defined bjam (
-  appveyor-retry b2.exe -l400 --hash openssl-version=pre1.1 warnings-as-errors=on -j2 %compiler% address-model=%model% picker-debugging=on invariant-checks=full variant=%variant% %linkflags% %include% link=shared crypto=%crypto% win-tests
+  appveyor-retry b2.exe -l400 --hash openssl-version=pre1.1 warnings=all warnings-as-errors=on -j2 %compiler% address-model=%model% picker-debugging=on invariant-checks=full variant=%variant% %linkflags% %include% link=shared crypto=%crypto% win-tests
   )
 
 - cd %ROOT_DIRECTORY%\bindings\python
diff --git a/bindings/python/Jamfile b/bindings/python/Jamfile
index 59518f693..ac4132c1a 100644
--- a/bindings/python/Jamfile
+++ b/bindings/python/Jamfile
@@ -210,6 +210,9 @@ my-python-extension libtorrent
     <conditional>@libtorrent_linking
     <crypto>openssl:<library>/torrent//ssl
     <crypto>openssl:<library>/torrent//crypto
+	# C4268: 'identifier' : 'const' static/global data initialized
+	#        with compiler generated default constructor fills the object with zeros
+	<toolset>msvc:<cflags>/wd4268
   : # default-build
     <warnings>all
   : # usage-requirements
diff --git a/bindings/python/src/converters.cpp b/bindings/python/src/converters.cpp
index fbc2286dd..6be582aef 100644
--- a/bindings/python/src/converters.cpp
+++ b/bindings/python/src/converters.cpp
@@ -54,7 +54,7 @@ struct tuple_to_endpoint
         if (PyTuple_Size(x) != 2) return nullptr;
         extract<std::string> ip(object(borrowed(PyTuple_GetItem(x, 0))));
         if (!ip.check()) return nullptr;
-        extract<int> port(object(borrowed(PyTuple_GetItem(x, 1))));
+        extract<std::uint16_t> port(object(borrowed(PyTuple_GetItem(x, 1))));
         if (!port.check()) return nullptr;
         lt::error_code ec;
         lt::address::from_string(ip, ec);
@@ -69,7 +69,7 @@ struct tuple_to_endpoint
 
         object o(borrowed(x));
         data->convertible = new (storage) T(lt::address::from_string(
-           extract<std::string>(o[0])), extract<int>(o[1]));
+           extract<std::string>(o[0])), extract<std::uint16_t>(o[1]));
     }
 };
 
diff --git a/bindings/python/src/error_code.cpp b/bindings/python/src/error_code.cpp
index 02bf56fc4..1808a84e5 100644
--- a/bindings/python/src/error_code.cpp
+++ b/bindings/python/src/error_code.cpp
@@ -145,14 +145,14 @@ private:
 	boost::system::error_category const* m_cat;
 };
 
-void error_code_assign(boost::system::error_code& self, int const v, category_holder const cat)
+void error_code_assign(boost::system::error_code& me, int const v, category_holder const cat)
 {
-	self.assign(v, cat.ref());
+	me.assign(v, cat.ref());
 }
 
-category_holder error_code_category(boost::system::error_code const& self)
+category_holder error_code_category(boost::system::error_code const& me)
 {
-	return category_holder(self.category());
+	return category_holder(me.category());
 }
 
 #define WRAP_CAT(name) \
diff --git a/bindings/python/src/torrent_handle.cpp b/bindings/python/src/torrent_handle.cpp
index 72d9fc2cc..c5a972a78 100644
--- a/bindings/python/src/torrent_handle.cpp
+++ b/bindings/python/src/torrent_handle.cpp
@@ -191,9 +191,9 @@ void dict_to_announce_entry(dict d, announce_entry& ae)
 {
    ae.url = extract<std::string>(d["url"]);
    if (d.has_key("tier"))
-      ae.tier = extract<int>(d["tier"]);
+      ae.tier = extract<std::uint8_t>(d["tier"]);
    if (d.has_key("fail_limit"))
-      ae.fail_limit = extract<int>(d["fail_limit"]);
+      ae.fail_limit = extract<std::uint8_t>(d["fail_limit"]);
 }
 
 void replace_trackers(torrent_handle& h, object trackers)
diff --git a/examples/Jamfile b/examples/Jamfile
index 311689a5a..312531397 100644
--- a/examples/Jamfile
+++ b/examples/Jamfile
@@ -15,6 +15,9 @@ project client_test
 	<toolset>darwin:<cflags>-Wno-unused-command-line-argument
 # disable warning C4275: non DLL-interface classkey 'identifier' used as base for DLL-interface classkey 'identifier'
 	<toolset>msvc:<cflags>/wd4275
+	# C4268: 'identifier' : 'const' static/global data initialized
+	#        with compiler generated default constructor fills the object with zeros
+	<toolset>msvc:<cflags>/wd4268
 	: default-build
 	<link>static
 	;
diff --git a/examples/bt-get2.cpp b/examples/bt-get2.cpp
index aadcc8180..6853c8e72 100644
--- a/examples/bt-get2.cpp
+++ b/examples/bt-get2.cpp
@@ -118,8 +118,8 @@ int main(int argc, char const* argv[]) try
 			if (auto rd = lt::alert_cast<lt::save_resume_data_alert>(a)) {
 				std::ofstream of(".resume_file", std::ios_base::binary);
 				of.unsetf(std::ios_base::skipws);
-				auto buf = write_resume_data_buf(rd->params);
-				of.write(buf.data(), buf.size());
+				auto const b = write_resume_data_buf(rd->params);
+				of.write(b.data(), b.size());
 			}
 
 			if (auto st = lt::alert_cast<lt::state_update_alert>(a)) {
diff --git a/examples/client_test.cpp b/examples/client_test.cpp
index 0273acd0c..993cbbc7d 100644
--- a/examples/client_test.cpp
+++ b/examples/client_test.cpp
@@ -102,7 +102,7 @@ bool sleep_and_input(int* c, lt::time_duration const sleep)
 		std::this_thread::sleep_for(sleep / 2);
 	}
 	return false;
-};
+}
 
 #else
 
diff --git a/examples/print.cpp b/examples/print.cpp
index cc8afe209..358e2148a 100644
--- a/examples/print.cpp
+++ b/examples/print.cpp
@@ -382,9 +382,9 @@ std::pair<int, int> terminal_size()
 }
 
 #ifdef _WIN32
-void apply_ansi_code(int* attributes, bool* reverse, bool* support_chaining, int code)
+void apply_ansi_code(WORD* attributes, bool* reverse, bool* support_chaining, int code)
 {
-	static const int color_table[8] =
+	static const WORD color_table[8] =
 	{
 		0, // black
 		FOREGROUND_RED, // red
@@ -459,7 +459,7 @@ void print(char const* buf)
 #ifdef _WIN32
 	HANDLE out = GetStdHandle(STD_OUTPUT_HANDLE);
 
-	int current_attributes = 7;
+	WORD current_attributes = 7;
 	bool reverse = false;
 	SetConsoleTextAttribute(out, current_attributes);
 
diff --git a/simulation/Jamfile b/simulation/Jamfile
index 135dbfb25..13f5eab8d 100644
--- a/simulation/Jamfile
+++ b/simulation/Jamfile
@@ -18,6 +18,7 @@ project
 	<source>utils.cpp
 	<toolset>msvc:<cflags>/wd4275
 	<toolset>msvc:<cflags>/wd4005
+	<toolset>msvc:<cflags>/wd4268
 	: default-build
 	<threading>multi
 	<invariant-checks>full
diff --git a/simulation/fake_peer.hpp b/simulation/fake_peer.hpp
index 23cad6d07..b740a1952 100644
--- a/simulation/fake_peer.hpp
+++ b/simulation/fake_peer.hpp
@@ -288,7 +288,8 @@ struct udp_server
 		boost::system::error_code ec;
 		m_socket.open(asio::ip::udp::v4(), ec);
 		TEST_CHECK(!ec);
-		m_socket.bind(asio::ip::udp::endpoint(asio::ip::address_v4::any(), port), ec);
+		m_socket.bind(asio::ip::udp::endpoint(asio::ip::address_v4::any()
+			, static_cast<std::uint16_t>(port)), ec);
 		TEST_CHECK(!ec);
 
 		m_socket.non_blocking(true);
diff --git a/simulation/setup_dht.cpp b/simulation/setup_dht.cpp
index e33e78463..b179ffb3f 100644
--- a/simulation/setup_dht.cpp
+++ b/simulation/setup_dht.cpp
@@ -152,7 +152,7 @@ struct dht_node final : lt::dht::socket_manager
 	}
 
 	bool has_quota() override { return true; }
-	bool send_packet(lt::aux::listen_socket_handle const& s, entry& e, udp::endpoint const& addr) override
+	bool send_packet(lt::aux::listen_socket_handle const&, entry& e, udp::endpoint const& addr) override
 	{
 		// since the simulaton is single threaded, we can get away with allocating
 		// just a single send buffer
diff --git a/simulation/test_auto_manage.cpp b/simulation/test_auto_manage.cpp
index fbd1b6ba8..706411691 100644
--- a/simulation/test_auto_manage.cpp
+++ b/simulation/test_auto_manage.cpp
@@ -74,7 +74,7 @@ void run_test(Settings const& sett, Setup const& setup, Test const& test)
 	// set up a timer to fire later, to verify everything we expected to happen
 	// happened
 	sim::timer t(sim, lt::seconds((num_torrents + 1) * 60)
-		, [&](boost::system::error_code const& ec)
+		, [&](boost::system::error_code const&)
 	{
 		test(*ses);
 
diff --git a/simulation/test_checking.cpp b/simulation/test_checking.cpp
index 3be86f3a6..42b8fb293 100644
--- a/simulation/test_checking.cpp
+++ b/simulation/test_checking.cpp
@@ -89,7 +89,7 @@ TORRENT_TEST(no_truncate_checking)
 	std::string filename;
 	int size = 0;
 	run_test(
-		[&](lt::add_torrent_params& atp, lt::settings_pack& p) {
+		[&](lt::add_torrent_params& atp, lt::settings_pack&) {
 			filename = lt::combine_path(atp.save_path, atp.ti->files().file_path(lt::file_index_t{0}));
 			std::ofstream f(filename);
 			// create a file that's 100 bytes larger
@@ -97,7 +97,7 @@ TORRENT_TEST(no_truncate_checking)
 			std::vector<char> dummy(size);
 			f.write(dummy.data(), dummy.size());
 		},
-		[](lt::session& ses) {}
+		[](lt::session&) {}
 		);
 
 	// file should not have been truncated just by checking
@@ -127,7 +127,7 @@ std::shared_ptr<lt::torrent_info> create_multifile_torrent()
 TORRENT_TEST(aligned_zero_priority)
 {
 	run_test(
-		[&](lt::add_torrent_params& atp, lt::settings_pack& p) {
+		[&](lt::add_torrent_params& atp, lt::settings_pack&) {
 			atp.file_priorities.push_back(lt::download_priority_t{1});
 			atp.file_priorities.push_back(lt::download_priority_t{0});
 			atp.ti = create_multifile_torrent();
@@ -147,7 +147,7 @@ TORRENT_TEST(aligned_zero_priority_no_file)
 {
 	std::string partfile;
 	run_test(
-		[&](lt::add_torrent_params& atp, lt::settings_pack& p) {
+		[&](lt::add_torrent_params& atp, lt::settings_pack&) {
 			atp.ti = create_multifile_torrent();
 			atp.save_path = ".";
 			atp.file_priorities.push_back(lt::download_priority_t{1});
@@ -181,7 +181,7 @@ TORRENT_TEST(zero_priority_missing_partfile)
 {
 	std::shared_ptr<lt::torrent_info> ti = create_multifile_torrent();
 	run_test(
-		[&](lt::add_torrent_params& atp, lt::settings_pack& p) {
+		[&](lt::add_torrent_params& atp, lt::settings_pack&) {
 			atp.ti = ti;
 			atp.save_path = ".";
 			atp.file_priorities.push_back(lt::download_priority_t{1});
diff --git a/simulation/test_dht_bootstrap.cpp b/simulation/test_dht_bootstrap.cpp
index 63f4cd02c..9070a6298 100644
--- a/simulation/test_dht_bootstrap.cpp
+++ b/simulation/test_dht_bootstrap.cpp
@@ -83,7 +83,7 @@ TORRENT_TEST(dht_bootstrap)
 
 	lt::deadline_timer timer(ios);
 	timer.expires_from_now(lt::seconds(10));
-	timer.async_wait([&](lt::error_code const& ec) {
+	timer.async_wait([&](lt::error_code const&) {
 		zombies.push_back(ses->abort());
 		node.close();
 		ses.reset();
diff --git a/simulation/test_dht_rate_limit.cpp b/simulation/test_dht_rate_limit.cpp
index 800c76b3b..fc93f3371 100644
--- a/simulation/test_dht_rate_limit.cpp
+++ b/simulation/test_dht_rate_limit.cpp
@@ -73,7 +73,7 @@ struct obs : dht::dht_observer
 
 #ifndef TORRENT_DISABLE_LOGGING
 	bool should_log(module_t) const override { return true; }
-	void log(dht_logger::module_t l, char const* fmt, ...) override
+	void log(dht_logger::module_t, char const* fmt, ...) override
 	{
 		va_list v;
 		va_start(v, fmt);
diff --git a/simulation/test_dht_storage.cpp b/simulation/test_dht_storage.cpp
index 4dc8d0d9b..dc3cb1acf 100644
--- a/simulation/test_dht_storage.cpp
+++ b/simulation/test_dht_storage.cpp
@@ -199,7 +199,7 @@ TORRENT_TEST(dht_storage_infohashes_sample)
 
 	sim::asio::high_resolution_timer timer(ios);
 	timer.expires_from_now(hours(1)); // expiration of torrents
-	timer.async_wait([&s](boost::system::error_code const& ec)
+	timer.async_wait([&s](boost::system::error_code const&)
 	{
 		// tick here to trigger the torrents expiration
 		s->tick();
diff --git a/simulation/test_error_handling.cpp b/simulation/test_error_handling.cpp
index 815765ee8..ef320ebac 100644
--- a/simulation/test_error_handling.cpp
+++ b/simulation/test_error_handling.cpp
@@ -129,7 +129,7 @@ void run_test(HandleAlerts const& on_alert, Test const& test)
 	params.save_path = save_path(1);
 	ses[1]->async_add_torrent(params);
 
-	sim::timer t(sim, lt::seconds(60), [&](boost::system::error_code const& ec)
+	sim::timer t(sim, lt::seconds(60), [&](boost::system::error_code const&)
 	{
 		test(ses);
 
@@ -200,7 +200,7 @@ TORRENT_TEST(error_handling)
 			using namespace lt;
 			run_test(
 				[](lt::session&, lt::alert const*) {},
-				[](std::shared_ptr<lt::session> ses[2]) {}
+				[](std::shared_ptr<lt::session>[2]) {}
 			);
 		}
 		catch (std::bad_alloc const&)
diff --git a/simulation/test_file_pool.cpp b/simulation/test_file_pool.cpp
index 7aec5386f..133534ef1 100644
--- a/simulation/test_file_pool.cpp
+++ b/simulation/test_file_pool.cpp
@@ -113,8 +113,7 @@ TORRENT_TEST(file_pool_size)
 			atp.ti->remap_files(fs);
 		}
 		// on alert
-		, [&](lt::alert const* a, lt::session&)
-		{}
+		, [&](lt::alert const*, lt::session&) {}
 		// terminate
 		, [&](int ticks, lt::session& ses) -> bool
 		{
diff --git a/simulation/test_http_connection.cpp b/simulation/test_http_connection.cpp
index 04e02e312..6b8f31f98 100644
--- a/simulation/test_http_connection.cpp
+++ b/simulation/test_http_connection.cpp
@@ -622,7 +622,7 @@ TORRENT_TEST(http_connection_ssl_proxy)
 	int proxy_counter = 0;
 
 	http_proxy.register_handler("10.0.0.2:8080"
-		, [&proxy_counter](std::string method, std::string req, std::map<std::string, std::string>& headers)
+		, [&proxy_counter](std::string method, std::string req, std::map<std::string, std::string>&)
 		{
 			proxy_counter++;
 			TEST_EQUAL(method, "CONNECT");
@@ -631,8 +631,8 @@ TORRENT_TEST(http_connection_ssl_proxy)
 
 	auto h = std::make_shared<http_connection>(client_ios
 		, res
-		, [&client_counter](error_code const& ec, http_parser const& parser
-		, span<char const>, http_connection& c)
+		, [&client_counter](error_code const& ec, http_parser const&
+		, span<char const>, http_connection&)
 		{
 			client_counter++;
 			TEST_EQUAL(ec, boost::asio::error::operation_not_supported);
diff --git a/simulation/test_pause.cpp b/simulation/test_pause.cpp
index ac1017936..a3b699b9f 100644
--- a/simulation/test_pause.cpp
+++ b/simulation/test_pause.cpp
@@ -118,7 +118,7 @@ TORRENT_TEST(torrent_paused_disconnect)
 {
 	run_test(
 		[](lt::session&) {},
-		[](lt::session&, lt::torrent_handle h, std::array<fake_peer*, 3>& test_peers) {
+		[](lt::session&, lt::torrent_handle h, std::array<fake_peer*, 3>&) {
 			add_fake_peers(h, 3);
 		},
 
diff --git a/simulation/test_pe_crypto.cpp b/simulation/test_pe_crypto.cpp
index c81585a31..3589971e3 100644
--- a/simulation/test_pe_crypto.cpp
+++ b/simulation/test_pe_crypto.cpp
@@ -45,7 +45,7 @@ POSSIBILITY OF SUCH DAMAGE.
 
 using namespace lt;
 
-char const* pe_policy(std::uint8_t policy)
+char const* pe_policy(int const policy)
 {
 	if (policy == settings_pack::pe_disabled) return "disabled";
 	else if (policy == settings_pack::pe_enabled) return "enabled";
@@ -90,9 +90,9 @@ void test_transfer(int enc_policy, int level, bool prefer_rc4)
 			pack.set_bool(settings_pack::prefer_rc4, false);
 		}
 		// add torrent
-		, [](lt::add_torrent_params& params) {}
+		, [](lt::add_torrent_params&) {}
 		// on alert
-		, [](lt::alert const* a, lt::session& ses) {}
+		, [](lt::alert const*, lt::session&) {}
 		// terminate
 		, [](int ticks, lt::session& ses) -> bool
 		{
@@ -176,9 +176,9 @@ TORRENT_TEST(disabled_failing)
 			pack.set_bool(settings_pack::prefer_rc4, true);
 		}
 		// add torrent
-		, [](lt::add_torrent_params& params) {}
+		, [](lt::add_torrent_params&) {}
 		// on alert
-		, [](lt::alert const* a, lt::session& ses) {}
+		, [](lt::alert const*, lt::session&) {}
 		// terminate
 		, [](int ticks, lt::session& ses) -> bool
 		{
diff --git a/simulation/test_session.cpp b/simulation/test_session.cpp
index 0fa2a5adf..684a3c51a 100644
--- a/simulation/test_session.cpp
+++ b/simulation/test_session.cpp
@@ -58,9 +58,9 @@ TORRENT_TEST(seed_mode)
 			params.flags |= torrent_flags::seed_mode;
 		}
 		// on alert
-		, [](lt::alert const* a, lt::session& ses) {}
+		, [](lt::alert const*, lt::session&) {}
 		// terminate
-		, [](int ticks, lt::session& ses) -> bool {
+		, [](int ticks, lt::session&) -> bool {
 			// we don't need to finish seeding, exit after 20 seconds
 			return ticks > 20;
 		});
@@ -80,9 +80,9 @@ TORRENT_TEST(ip_notifier_setting)
 			pack.set_int(settings_pack::alert_mask, alert::all_categories);
 		}
 		// add torrent
-		, [](lt::add_torrent_params& params) {}
+		, [](lt::add_torrent_params&) {}
 		// on alert
-		, [&s_tick, &working_count](lt::alert const* a, lt::session& ses)
+		, [&s_tick, &working_count](lt::alert const* a, lt::session&)
 		{
 			std::string const msg = a->message();
 			if (msg.find("received error on_ip_change:") != std::string::npos)
@@ -148,13 +148,13 @@ TORRENT_TEST(add_extension_while_transfer)
 			pack.set_int(settings_pack::alert_mask, alert::all_categories);
 		}
 		// add torrent
-		, [](lt::add_torrent_params& params) {}
+		, [](lt::add_torrent_params&) {}
 		// on alert
-		, [&done, p](lt::alert const* a, lt::session& ses)
+		, [&done, p](lt::alert const* a, lt::session&)
 		{
 			if (a->type() == peer_connect_alert::alert_type)
 			{
-				auto create_test_plugin = [p](torrent_handle const& th, void*)
+				auto create_test_plugin = [p](torrent_handle const&, void*)
 				{ return p; };
 
 				lt::torrent_handle th = alert_cast<peer_connect_alert>(a)->handle;
@@ -164,7 +164,7 @@ TORRENT_TEST(add_extension_while_transfer)
 			}
 		}
 		// terminate
-		, [&done](int ticks, lt::session& ses) -> bool
+		, [&done](int ticks, lt::session&) -> bool
 		{
 			// exit after 10 seconds
 			return ticks > 10 || done;
diff --git a/simulation/test_socks5.cpp b/simulation/test_socks5.cpp
index 483522663..e30dc2fe2 100644
--- a/simulation/test_socks5.cpp
+++ b/simulation/test_socks5.cpp
@@ -180,11 +180,11 @@ TORRENT_TEST(udp_tracker)
 			params.save_path = ".";
 			ses.async_add_torrent(params);
 		},
-		[&tracker_alert](lt::session& ses, lt::alert const* alert) {
+		[&tracker_alert](lt::session&, lt::alert const* alert) {
 			if (lt::alert_cast<lt::tracker_announce_alert>(alert))
 				tracker_alert = true;
 		},
-		[&](sim::simulation& sim, lt::session& ses
+		[&](sim::simulation& sim, lt::session&
 			, std::shared_ptr<lt::torrent_info> ti)
 		{
 			// listen on port 8080
@@ -269,7 +269,7 @@ TORRENT_TEST(socks5_udp_retry)
 
 	// run for 60 seconds.The sokcks5 retry interval is expected to be 5 seconds,
 	// meaning there should have been 12 connection attempts
-	sim::timer t(sim, lt::seconds(60), [&](boost::system::error_code const& ec)
+	sim::timer t(sim, lt::seconds(60), [&](boost::system::error_code const&)
 	{
 		fprintf(stderr, "shutting down\n");
 		// shut down
diff --git a/simulation/test_swarm.cpp b/simulation/test_swarm.cpp
index e1fd547a9..f581feb78 100644
--- a/simulation/test_swarm.cpp
+++ b/simulation/test_swarm.cpp
@@ -110,9 +110,9 @@ TORRENT_TEST(seed_mode_suggest)
 			params.flags |= torrent_flags::seed_mode;
 		}
 		// on alert
-		, [](lt::alert const* a, lt::session& ses) {}
+		, [](lt::alert const*, lt::session&) {}
 		// terminate
-		, [](int ticks, lt::session& ses) -> bool
+		, [](int, lt::session&) -> bool
 		{ return true; });
 }
 
@@ -559,7 +559,7 @@ TORRENT_TEST(delete_partfile)
 		// add torrent
 		, [](lt::add_torrent_params&) {}
 		// on alert
-		, [](lt::alert const* a, lt::session&) {}
+		, [](lt::alert const*, lt::session&) {}
 		// terminate
 		, [&save_path](int, lt::session& ses) -> bool
 		{
@@ -637,10 +637,10 @@ TORRENT_TEST(block_uploaded_alert)
 				int blocks_per_piece = at->handle.torrent_file()->piece_length() / 0x4000;
 				blocks.resize(at->handle.torrent_file()->num_pieces(), std::vector<bool>(blocks_per_piece, false));
 			}
-			else if (auto at = lt::alert_cast<lt::block_uploaded_alert>(a))
+			else if (auto ua = lt::alert_cast<lt::block_uploaded_alert>(a))
 			{
-				TEST_EQUAL(blocks[static_cast<int>(at->piece_index)][at->block_index], false);
-				blocks[static_cast<int>(at->piece_index)][at->block_index] = true;
+				TEST_EQUAL(blocks[static_cast<int>(ua->piece_index)][ua->block_index], false);
+				blocks[static_cast<int>(ua->piece_index)][ua->block_index] = true;
 			}
 		}
 		// terminate
@@ -667,9 +667,9 @@ void test_settings(SettingsFun fun)
 		// add session
 		, fun
 		// add torrent
-		, [](lt::add_torrent_params& params) {}
+		, [](lt::add_torrent_params&) {}
 		// on alert
-		, [](lt::alert const* a, lt::session& ses) {}
+		, [](lt::alert const*, lt::session&) {}
 		// terminate
 		, [](int ticks, lt::session& ses) -> bool
 		{
diff --git a/simulation/test_tracker.cpp b/simulation/test_tracker.cpp
index 1b8288fa8..f83329bd9 100644
--- a/simulation/test_tracker.cpp
+++ b/simulation/test_tracker.cpp
@@ -124,7 +124,7 @@ void test_interval(int interval)
 			}
 		}
 		// terminate
-		, [&](int const ticks, lt::session& ses) -> bool {
+		, [&](int const ticks, lt::session&) -> bool {
 			if (ticks > duration + 1)
 			{
 				ran_to_completion = true;
@@ -479,7 +479,7 @@ void test_udpv6_support(char const* listen_interfaces
 					}
 					else if (alert_cast<tracker_error_alert>(a))
 					{
-						TEST_CHECK(false && "unexpected tracker error");
+						TEST_ERROR("unexpected tracker error");
 					}
 				}
 			});
@@ -1003,13 +1003,13 @@ TORRENT_TEST(tracker_key_argument)
 {
 	std::set<std::string> keys;
 	tracker_test(
-		[](lt::add_torrent_params& p, lt::session& ses)
+		[](lt::add_torrent_params& p, lt::session&)
 		{
 			p.ti = make_torrent(true);
 			return 60;
 		},
-		[&](std::string method, std::string req
-			, std::map<std::string, std::string>& headers)
+		[&](std::string, std::string req
+			, std::map<std::string, std::string>&)
 		{
 			auto const pos = req.find("&key=");
 			TEST_CHECK(pos != std::string::npos);
@@ -1198,7 +1198,7 @@ TORRENT_TEST(tracker_tiers)
 	ses[1] = std::make_shared<lt::session>(pack, ios1);
 
 	// only monitor alerts for session 0 (the downloader)
-	print_alerts(*ses[0], [=](lt::session& ses, lt::alert const* a) {
+	print_alerts(*ses[0], [=](lt::session&, lt::alert const* a) {
 		if (auto ta = alert_cast<lt::add_torrent_alert>(a))
 		{
 			ta->handle.connect_peer(lt::tcp::endpoint(peer1, 6881));
@@ -1224,7 +1224,7 @@ TORRENT_TEST(tracker_tiers)
 	params.save_path = save_path(1);
 	ses[1]->async_add_torrent(params);
 
-	sim::timer t(sim, lt::minutes(30), [&](boost::system::error_code const& ec)
+	sim::timer t(sim, lt::minutes(30), [&](boost::system::error_code const&)
 	{
 		TEST_CHECK(received_announce[0] != received_announce[1]);
 		TEST_CHECK(ses[0]->get_torrents()[0].status().is_seeding);
diff --git a/simulation/test_transfer.cpp b/simulation/test_transfer.cpp
index 4f82610b8..080891415 100644
--- a/simulation/test_transfer.cpp
+++ b/simulation/test_transfer.cpp
@@ -140,7 +140,7 @@ void run_test(
 	params.save_path = save_path(1);
 	ses[1]->async_add_torrent(params);
 
-	sim::timer t(sim, lt::seconds(60), [&](boost::system::error_code const& ec)
+	sim::timer t(sim, lt::seconds(60), [&](boost::system::error_code const&)
 	{
 		test(ses);
 
diff --git a/simulation/test_web_seed.cpp b/simulation/test_web_seed.cpp
index 3608e747f..fc530ea19 100644
--- a/simulation/test_web_seed.cpp
+++ b/simulation/test_web_seed.cpp
@@ -127,7 +127,7 @@ void run_test(Setup const& setup
 
 	// set up a timer to fire later, to verify everything we expected to happen
 	// happened
-	sim::timer t(sim, timeout, [&](boost::system::error_code const& ec)
+	sim::timer t(sim, timeout, [&](boost::system::error_code const&)
 	{
 		std::printf("shutting down\n");
 		// shut down
@@ -153,8 +153,8 @@ TORRENT_TEST(single_file)
 		{
 			ses.async_add_torrent(params);
 		},
-		[](lt::session& ses, lt::alert const* alert) {},
-		[&expected](sim::simulation& sim, lt::session& ses)
+		[](lt::session&, lt::alert const*) {},
+		[&expected](sim::simulation& sim, lt::session&)
 		{
 			sim::asio::io_service web_server(sim, address_v4::from_string("2.2.2.2"));
 			// listen on port 8080
@@ -191,8 +191,8 @@ TORRENT_TEST(multi_file)
 		{
 			ses.async_add_torrent(params);
 		},
-		[](lt::session& ses, lt::alert const* alert) {},
-		[&expected](sim::simulation& sim, lt::session& ses)
+		[](lt::session&, lt::alert const*) {},
+		[&expected](sim::simulation& sim, lt::session&)
 		{
 			sim::asio::io_service web_server(sim, address_v4::from_string("2.2.2.2"));
 			// listen on port 8080
@@ -226,9 +226,9 @@ std::string generate_content(lt::file_storage const& fs, file_index_t file
 	std::string ret;
 	ret.reserve(lt::aux::numeric_cast<std::size_t>(len));
 	std::int64_t const file_offset = fs.file_offset(file);
-	int const piece_size = fs.piece_length();
+	int const piece_sz = fs.piece_length();
 	for (std::int64_t i = offset + file_offset; i < offset + file_offset + len; ++i)
-		ret.push_back(((i % piece_size) % 26) + 'A');
+		ret.push_back(((i % piece_sz) % 26) + 'A');
 	return ret;
 }
 
@@ -258,11 +258,11 @@ TORRENT_TEST(unaligned_file_redirect)
 		{
 			ses.async_add_torrent(params);
 		},
-		[&](lt::session& ses, lt::alert const* alert) {
+		[&](lt::session&, lt::alert const* alert) {
 			if (lt::alert_cast<lt::torrent_finished_alert>(alert))
 				seeding = true;
 		},
-		[&fs](sim::simulation& sim, lt::session& ses)
+		[&fs](sim::simulation& sim, lt::session&)
 		{
 			// http1 is the root web server that will just redirect requests to
 			// other servers
@@ -307,11 +307,11 @@ TORRENT_TEST(multi_file_redirect_pad_files)
 		{
 			ses.async_add_torrent(params);
 		},
-		[&](lt::session& ses, lt::alert const* alert) {
+		[&](lt::session&, lt::alert const* alert) {
 			if (lt::alert_cast<lt::torrent_finished_alert>(alert))
 				seeding = true;
 		},
-		[&fs](sim::simulation& sim, lt::session& ses)
+		[&fs](sim::simulation& sim, lt::session&)
 		{
 			// http1 is the root web server that will just redirect requests to
 			// other servers
@@ -355,11 +355,11 @@ TORRENT_TEST(multi_file_redirect)
 		{
 			ses.async_add_torrent(params);
 		},
-		[&](lt::session& ses, lt::alert const* alert) {
+		[&](lt::session&, lt::alert const* alert) {
 			if (lt::alert_cast<lt::torrent_finished_alert>(alert))
 				seeding = true;
 		},
-		[&fs](sim::simulation& sim, lt::session& ses)
+		[&fs](sim::simulation& sim, lt::session&)
 		{
 			// http1 is the root web server that will just redirect requests to
 			// other servers
@@ -413,12 +413,12 @@ TORRENT_TEST(multi_file_redirect_through_proxy)
 
 			ses.async_add_torrent(params);
 		},
-		[&](lt::session& ses, lt::alert const* alert) {
+		[&](lt::session&, lt::alert const* alert) {
 			if (lt::alert_cast<lt::torrent_finished_alert>(alert)) {
 				seeding = true;
 			}
 		},
-		[&fs](sim::simulation& sim, lt::session& ses)
+		[&fs](sim::simulation& sim, lt::session&)
 		{
 			sim::asio::io_service proxy_ios(sim, address_v4::from_string("50.50.50.50"));
 			sim::http_proxy http_p(proxy_ios, 4445);
@@ -464,11 +464,11 @@ TORRENT_TEST(multi_file_unaligned_redirect)
 		{
 			ses.async_add_torrent(params);
 		},
-		[&](lt::session& ses, lt::alert const* alert) {
+		[&](lt::session&, lt::alert const* alert) {
 			// We don't expect to get this aslert
 			TEST_CHECK(lt::alert_cast<lt::torrent_finished_alert>(alert) == nullptr);
 		},
-		[&fs](sim::simulation& sim, lt::session& ses)
+		[&fs](sim::simulation& sim, lt::session&)
 		{
 			// http1 is the root web server that will just redirect requests to
 			// other servers
@@ -507,13 +507,13 @@ TORRENT_TEST(urlseed_timeout)
 			params.save_path = ".";
 			ses.async_add_torrent(params);
 		},
-		[&timeout](lt::session& ses, lt::alert const* alert) {
+		[&timeout](lt::session&, lt::alert const* alert) {
 			const lt::peer_disconnected_alert *pda = lt::alert_cast<lt::peer_disconnected_alert>(alert);
 			if (pda && pda->error == errors::timed_out_inactivity){
 				timeout = true;
 			}
 		},
-		[](sim::simulation& sim, lt::session& ses)
+		[](sim::simulation& sim, lt::session&)
 		{
 			sim::asio::io_service web_server(sim, address_v4::from_string("2.2.2.2"));
 
@@ -547,8 +547,8 @@ TORRENT_TEST(no_close_redudant_webseed)
 			ses.apply_settings(pack);
 			ses.async_add_torrent(params);
 		},
-		[](lt::session& ses, lt::alert const* alert) {},
-		[&expected](sim::simulation& sim, lt::session& ses)
+		[](lt::session&, lt::alert const*) {},
+		[&expected](sim::simulation& sim, lt::session&)
 		{
 			sim::asio::io_service web_server(sim, address_v4::from_string("2.2.2.2"));
 			// listen on port 8080
@@ -595,8 +595,8 @@ TORRENT_TEST(web_seed_connection_limit)
 			ses.apply_settings(pack);
 			ses.async_add_torrent(params);
 		},
-		[](lt::session& ses, lt::alert const* alert) {},
-		[&expected](sim::simulation& sim, lt::session& ses)
+		[](lt::session&, lt::alert const*) {},
+		[&expected](sim::simulation& sim, lt::session&)
 		{
 			using ios = sim::asio::io_service;
 			ios web_server1{sim, address_v4::from_string("2.2.2.1")};
diff --git a/test/Jamfile b/test/Jamfile
index f6765f480..a0d87c3ed 100644
--- a/test/Jamfile
+++ b/test/Jamfile
@@ -53,6 +53,9 @@ project
 	<toolset>msvc:<cflags>/wd4309
 	# C4310: cast truncates constant value
 	<toolset>msvc:<cflags>/wd4310
+	# C4268: 'identifier' : 'const' static/global data initialized
+	#        with compiler generated default constructor fills the object with zeros
+	<toolset>msvc:<cflags>/wd4268
 	<conditional>@warnings
 	<export-extra>on
 	: default-build
diff --git a/tools/Jamfile b/tools/Jamfile
index b8ccfaf31..087384caa 100644
--- a/tools/Jamfile
+++ b/tools/Jamfile
@@ -30,6 +30,9 @@ project tools
 	<threading>multi
 # disable warning C4275: non DLL-interface classkey 'identifier' used as base for DLL-interface classkey 'identifier'
 	<toolset>msvc:<cflags>/wd4275
+	# C4268: 'identifier' : 'const' static/global data initialized
+	#        with compiler generated default constructor fills the object with zeros
+	<toolset>msvc:<cflags>/wd4268
 	<conditional>@link_libtorrent
 	: default-build
 	<link>static