diff --git a/aegisub/libaegisub/windows/access.cpp b/aegisub/libaegisub/windows/access.cpp
index 4264aefd6..0c9efec32 100644
--- a/aegisub/libaegisub/windows/access.cpp
+++ b/aegisub/libaegisub/windows/access.cpp
@@ -19,25 +19,14 @@
 /// @ingroup libaegisub windows
 
 #ifndef LAGI_PRE
-#include <sys/stat.h>
-#include <io.h>
-#include <errno.h>
+#include <windows.h>
 
 #include <iostream>
 #include <fstream>
 #endif
 
-#ifndef R_OK
-#define R_OK 04
-#endif
-#ifndef W_OK
-#define W_OK 02
-#endif
-
-#pragma warning(disable: 4996)
-
-
 #include "libaegisub/util.h"
+#include "libaegisub/util_win.h"
 
 namespace agi {
 	namespace acs {
@@ -61,24 +50,43 @@ void CheckDirWrite(const std::string &dir) {
 	Check(dir, acs::DirWrite);
 }
 
-
+/*
+This function is still a proof of concept, it's probably rife with bugs, below
+is a short (and incomplete) todo
+ * "Basic" checks (Read/Write/File/Dir) checks for FAT32 filesystems which
+   requires detecting the filesystem being used.
+*/
 void Check(const std::string &file, acs::Type type) {
-	struct stat file_stat;
-	int file_status;
+	std::wstring wfile;
+	wfile.assign(file.begin(), file.end());
 
-	file_status = stat(file.c_str(), &file_stat);
+	SECURITY_DESCRIPTOR* sd;
+	DWORD len = 0;
+	SECURITY_INFORMATION info = OWNER_SECURITY_INFORMATION | GROUP_SECURITY_INFORMATION | DACL_SECURITY_INFORMATION;
+	HANDLE client_token;
+	PRIVILEGE_SET priv_set;
+	DWORD priv_set_size = sizeof(PRIVILEGE_SET);
+	BOOL access_ok;
+	GENERIC_MAPPING generic_mapping;
+	DWORD access_check;
+	DWORD access;
+	DWORD file_attr;
 
-	if (file_status != 0) {
-		switch (errno) {
-			case ENOENT:
+	file_attr = GetFileAttributes(wfile.c_str());
+
+	if ((file_attr & INVALID_FILE_ATTRIBUTES) == INVALID_FILE_ATTRIBUTES) {
+
+		switch (GetLastError()) {
+			case ERROR_FILE_NOT_FOUND:
+			case ERROR_PATH_NOT_FOUND:
 				throw AcsNotFound("File or path not found.");
 			break;
 
-			case EACCES:
-				throw AcsAccess("Access Denied to file, path or path component.");
+			case ERROR_ACCESS_DENIED:
+				throw AcsAccess("Access denied to file or path component");
 			break;
 
-			case EIO:
+			default:
 				throw AcsFatal("Fatal I/O error occurred.");
 			break;
 		}
@@ -86,33 +94,71 @@ void Check(const std::string &file, acs::Type type) {
 
 	switch (type) {
 		case FileRead:
-		case FileWrite:
-			if ((file_stat.st_mode & S_IFREG) == 0)
+		case FileWrite: {
+			if ((file_attr & FILE_ATTRIBUTE_DIRECTORY) == FILE_ATTRIBUTE_DIRECTORY)
 				throw AcsNotAFile("Not a file.");
-		break;
-
+			break;
+		}
 		case DirRead:
-		case DirWrite:
-			if ((file_stat.st_mode & S_IFDIR) == 0)
+		case DirWrite: {
+			if ((file_attr & FILE_ATTRIBUTE_DIRECTORY) != FILE_ATTRIBUTE_DIRECTORY)
 				throw AcsNotADirectory("Not a directory.");
-		break;
+			break;
+		}
+	}
+
+	GetFileSecurity(wfile.c_str(), info, NULL, 0, &len);
+	if (GetLastError() != ERROR_INSUFFICIENT_BUFFER) {
+		std::cout << "GetFileSecurity: fatal: " << util::ErrorString(GetLastError()) << std::endl;
+	}
+
+	sd = (SECURITY_DESCRIPTOR *)malloc(len);
+	if (sd == NULL) {
+		std::cout << "GetFileSecurity: insufficient memory" << std::endl;
+	} else {
+		if (!GetFileSecurity(wfile.c_str(), info, sd, len, &len)) {
+			std::cout << "GetFileSecurity failed:  " << util::ErrorString(GetLastError()) << std::endl;
+			free(sd);
+		}
+	}
+
+	ImpersonateSelf(SecurityImpersonation);
+	if (!OpenThreadToken(GetCurrentThread(), TOKEN_ALL_ACCESS, TRUE, &client_token)) {
+		std::cout << "OpenThreadToken failed: " << util::ErrorString(GetLastError()) << std::endl;
 	}
 
 	switch (type) {
 		case DirRead:
-		case FileRead:
-			file_status = access(file.c_str(), R_OK);
-			if (file_status != 0)
+		case FileRead: {
+			access_check = FILE_READ_DATA;
+			MapGenericMask(&access_check, &generic_mapping);
+			if(!AccessCheck(sd, client_token, access_check, &generic_mapping, &priv_set, &priv_set_size, &access, &access_ok)) {
+				std::cout << "AccessCheck failed: " << util::ErrorString(GetLastError()) << std::endl;
+			}
+			free(sd);
+			if (!access)
 				throw AcsRead("File or directory is not readable.");
-		break;
-
+			break;
+		}
 		case DirWrite:
-		case FileWrite:
-			file_status = access(file.c_str(), W_OK);
-			if (file_status != 0)
+		case FileWrite: {
+			access_check = FILE_APPEND_DATA | FILE_WRITE_DATA;
+			MapGenericMask(&access_check, &generic_mapping);
+			if(!AccessCheck(sd, client_token, access_check, &generic_mapping, &priv_set, &priv_set_size, &access, &access_ok)) {
+				std::cout << "AccessCheck failed: " << util::ErrorString(GetLastError()) << std::endl;
+			}
+			free(sd);
+			if (!access)
 				throw AcsWrite("File or directory is not writable.");
-		break;
-	}
-}
+			break;
+		}
+		default: {
+			std::cout << "Warning: type not handled" << std::endl;
+			free(sd);
+		}
 	}
+
 }
+
+	} // namespace Access
+} // namespace agi