diff --git a/dlls/gdi32/bidi.c b/dlls/gdi32/bidi.c
index adffedccef9..1bb38d8d0ef 100644
--- a/dlls/gdi32/bidi.c
+++ b/dlls/gdi32/bidi.c
@@ -653,8 +653,8 @@ enum resolvestates
     l,  /* L and characters resolved to L */
     rn, /* N preceded by right */
     ln, /* N preceded by left */
-    a,  /* AN preceded by left (the abbrev 'la' is used up above) */
-    na, /* N preceeded by a */
+    a,  /* AN preceded by left (the abbreviation 'la' is used up above) */
+    na, /* N preceded by a */
 } ;
 
 
diff --git a/dlls/gdi32/font.c b/dlls/gdi32/font.c
index 269638fd3fb..4265ec9114c 100644
--- a/dlls/gdi32/font.c
+++ b/dlls/gdi32/font.c
@@ -3213,14 +3213,14 @@ INT WINAPI AddFontResourceExW( LPCWSTR str, DWORD fl, PVOID pdv )
     int ret = WineEngAddFontResourceEx(str, fl, pdv);
     if (ret == 0)
     {
-        /* Freetype <2.3.5 have problems reading resources wrapped in PE files. */
+        /* FreeType <2.3.5 has problems reading resources wrapped in PE files. */
         HMODULE hModule = LoadLibraryExW(str, NULL, LOAD_LIBRARY_AS_DATAFILE);
         if (hModule != NULL)
         {
             int num_resources = 0;
             LPWSTR rt_font = (LPWSTR)((ULONG_PTR)8);  /* we don't want to include winuser.h */
 
-            TRACE("WineEndAddFontResourceEx failed on PE file %s - trying to load resources manualy\n",
+            TRACE("WineEndAddFontResourceEx failed on PE file %s - trying to load resources manually\n",
                 wine_dbgstr_w(str));
             if (EnumResourceNamesW(hModule, rt_font, load_enumed_resource, (LONG_PTR)&num_resources))
                 ret = num_resources;
diff --git a/dlls/ntdll/signal_i386.c b/dlls/ntdll/signal_i386.c
index dbdf119e908..0603e44b91b 100644
--- a/dlls/ntdll/signal_i386.c
+++ b/dlls/ntdll/signal_i386.c
@@ -1250,7 +1250,7 @@ static void fpe_handler( int signal, siginfo_t *siginfo, void *sigcontext )
 
         rec->ExceptionCode = STATUS_FLOAT_MULTIPLE_TRAPS;
         rec->NumberParameters = 1;
-        /* no idea what meaning is actually behind this but thats what native does */
+        /* no idea what meaning is actually behind this but that's what native does */
         rec->ExceptionInformation[0] = 0;
         break;
     default:
diff --git a/dlls/oleaut32/ungif.c b/dlls/oleaut32/ungif.c
index 9040632051c..e7689789fe3 100644
--- a/dlls/oleaut32/ungif.c
+++ b/dlls/oleaut32/ungif.c
@@ -642,17 +642,17 @@ DGifDecompressLine(GifFileType * GifFile,
             Private->MaxCode1 = 1 << Private->RunningBits;
             LastCode = Private->LastCode = NO_SUCH_CODE;
         } else {
-            /* Its regular code - if in pixel range simply add it to output
+            /* It's a regular code - if in pixel range simply add it to output
              * stream, otherwise trace to codes linked list until the prefix
              * is in pixel range: */
             if (CrntCode < ClearCode) {
                 /* This is simple - its pixel scalar, so add it to output: */
                 Line[i++] = CrntCode;
             } else {
-                /* Its a code to needed to be traced: trace the linked list
+                /* It's a code to be traced: trace the linked list
                  * until the prefix is a pixel, while pushing the suffix
                  * pixels on our stack. If we done, pop the stack in reverse
-                 * (thats what stack is good for!) order to output.  */
+                 * order (that's what stack is good for!) for output.  */
                 if (Prefix[CrntCode] == NO_SUCH_CODE) {
                     /* Only allowed if CrntCode is exactly the running code:
                      * In that case CrntCode = XXXCode, CrntCode or the
diff --git a/dlls/twain_32/TWAIN b/dlls/twain_32/TWAIN
index 29bc4f30fb0..b89f6be6bc7 100644
--- a/dlls/twain_32/TWAIN
+++ b/dlls/twain_32/TWAIN
@@ -53,7 +53,7 @@ ICAP_XRESOLUTION
 ICAP_YRESOLUTION
 All Sources must implement the advertised features supported by their devices. They must
 make these features available to applications via the TWAIN protocol. For example, a Source
-thats connected to a device that has an ADF must support DG_CONTROL /
+that's connected to a device that has an ADF must support DG_CONTROL /
 DAT_CAPABILITY / MSG_GET, MSG_GETCURRENT, MSG_GETDEFAULT on:
 CAP_FEEDERENABLED
 CAP_FEEDERLOADED
diff --git a/dlls/user32/tests/win.c b/dlls/user32/tests/win.c
index b318677c189..548f13cbd8e 100644
--- a/dlls/user32/tests/win.c
+++ b/dlls/user32/tests/win.c
@@ -4257,8 +4257,8 @@ static void test_GetUpdateRect(void)
         }
         DispatchMessage(&msg);
     }
-    ok(parent_wm_paint, "WM_PAINT should have been recieved in parent\n");
-    ok(!grandparent_wm_paint, "WM_PAINT should NOT have been recieved in grandparent\n");
+    ok(parent_wm_paint, "WM_PAINT should have been received in parent\n");
+    ok(!grandparent_wm_paint, "WM_PAINT should NOT have been received in grandparent\n");
 
     DestroyWindow(hgrandparent);
 
@@ -4321,8 +4321,8 @@ static void test_GetUpdateRect(void)
         }
         DispatchMessage(&msg);
     }
-    ok(parent_wm_paint, "WM_PAINT should have been recieved in parent\n");
-    ok(!grandparent_wm_paint, "WM_PAINT should NOT have been recieved in grandparent\n");
+    ok(parent_wm_paint, "WM_PAINT should have been received in parent\n");
+    ok(!grandparent_wm_paint, "WM_PAINT should NOT have been received in grandparent\n");
 
     DestroyWindow(hgrandparent);
 }
diff --git a/dlls/wined3d/arb_program_shader.c b/dlls/wined3d/arb_program_shader.c
index 62b5c74e5c8..b4d14268151 100644
--- a/dlls/wined3d/arb_program_shader.c
+++ b/dlls/wined3d/arb_program_shader.c
@@ -255,7 +255,7 @@ void shader_generate_arb_declarations(
          */
         if(max_constantsF + extra_constants_needed + 1 < GL_LIMITS(pshader_constantsF) && FALSE) {
             /* The idea is that if srgb is enabled, then disabled, the constant loading code
-             * can effectively disabling sRGB correction by passing 1.0 and INF as the multiplication
+             * can effectively disable sRGB correction by passing 1.0 and INF as the multiplication
              * and comparison constants. If it disables it that way, the shader won't be recompiled
              * and the code will stay in, so sRGB writing can be turned on again by setting the
              * constants from the spec
diff --git a/dlls/wined3d/directx.c b/dlls/wined3d/directx.c
index ce72d88d693..eef40b87051 100644
--- a/dlls/wined3d/directx.c
+++ b/dlls/wined3d/directx.c
@@ -994,14 +994,14 @@ BOOL IWineD3DImpl_FillGLCaps(WineD3D_GL_Info *gl_info) {
                 /* Radeon R3xx */ 
                 else {
                     gl_info->gl_card = CARD_ATI_RADEON_9500; /* Radeon 9500/9550/9600/9700/9800/X300/X550/X600 */
-                    vidmem = 64; /* Radeon 9500 uses 64MB, higher models use upto 256MB */
+                    vidmem = 64; /* Radeon 9500 uses 64MB, higher models use up to 256MB */
                 }
             } else if(WINE_D3D8_CAPABLE(gl_info)) {
                 gl_info->gl_card = CARD_ATI_RADEON_8500; /* Radeon 8500/9000/9100/9200/9300 */
                 vidmem = 64; /* 8500/9000 cards use mostly 64MB, though there are 32MB and 128MB models */
             } else if(WINE_D3D7_CAPABLE(gl_info)) {
                 gl_info->gl_card = CARD_ATI_RADEON_7200; /* Radeon 7000/7100/7200/7500 */
-                vidmem = 32; /* There are models with upto 64MB */
+                vidmem = 32; /* There are models with up to 64MB */
             } else
                 gl_info->gl_card = CARD_ATI_RAGE_128PRO;
                 vidmem = 16; /* There are 16-32MB models */
diff --git a/dlls/wined3d/glsl_shader.c b/dlls/wined3d/glsl_shader.c
index 57685a3c272..b0ca134549a 100644
--- a/dlls/wined3d/glsl_shader.c
+++ b/dlls/wined3d/glsl_shader.c
@@ -2047,8 +2047,8 @@ void pshader_glsl_texdepth(SHADER_OPCODE_ARG* arg) {
 
     /* Tests show that texdepth never returns anything below 0.0, and that r5.y is clamped to 1.0.
      * Negative input is accepted, -0.25 / -0.5 returns 0.5. GL should clamp gl_FragDepth to [0;1], but
-     * this doesn't always work, so clamp the results manually. Wether or not the x value is clamped at 1
-     * too is irrelevant, since if x = 0, any y value < 1.0(and > 1.0 is not allowed) results in a result
+     * this doesn't always work, so clamp the results manually. Whether or not the x value is clamped at 1
+     * too is irrelevant, since if x = 0, any y value < 1.0 (and > 1.0 is not allowed) results in a result
      * >= 1.0 or < 0.0
      */
     shader_addline(arg->buffer, "gl_FragDepth = (%s.y == 0.0) ? 1.0 : clamp((%s.x / min(%s.y, 1.0)), 0.0, 1.0);\n", dst_param.reg_name, dst_param.reg_name, dst_param.reg_name);
diff --git a/dlls/wined3d/surface.c b/dlls/wined3d/surface.c
index 0b5d06698a7..ee086e35652 100644
--- a/dlls/wined3d/surface.c
+++ b/dlls/wined3d/surface.c
@@ -639,7 +639,7 @@ static HRESULT WINAPI IWineD3DSurfaceImpl_LockRect(IWineD3DSurface *iface, WINED
         This->Flags &= ~SFLAG_INSYSMEM; /* This is the marker that surface data has to be downloaded */
     }
 
-    /* Create a PBO for dynamicly locked surfaces but don't do it for converted or non-pow2 surfaces.
+    /* Create a PBO for dynamically locked surfaces but don't do it for converted or non-pow2 surfaces.
      * Also don't create a PBO for systemmem surfaces. */
     if(GL_SUPPORT(ARB_PIXEL_BUFFER_OBJECT) && (This->Flags & SFLAG_DYNLOCK) && !(This->Flags & (SFLAG_PBO | SFLAG_CONVERTED | SFLAG_NONPOW2)) && (This->resource.pool != WINED3DPOOL_SYSTEMMEM)) {
         GLenum error;
diff --git a/dlls/wined3d/wined3d_private.h b/dlls/wined3d/wined3d_private.h
index 68fc6463a8d..86fd2dc8c6a 100644
--- a/dlls/wined3d/wined3d_private.h
+++ b/dlls/wined3d/wined3d_private.h
@@ -1186,7 +1186,7 @@ const void *WINAPI IWineD3DSurfaceImpl_GetData(IWineD3DSurface *iface);
 #define SFLAG_GLCKEY      0x00008000 /* The gl texture was created with a color key */
 #define SFLAG_CLIENT      0x00010000 /* GL_APPLE_client_storage is used on that texture */
 #define SFLAG_ALLOCATED   0x00020000 /* A gl texture is allocated for this surface */
-#define SFLAG_PBO         0x00040000 /* Has a PBO attached for speeding data transfer for dynamicly locked surfaces */
+#define SFLAG_PBO         0x00040000 /* Has a PBO attached for speeding up data transfers for dynamically locked surfaces */
 
 /* In some conditions the surface memory must not be freed:
  * SFLAG_OVERSIZE: Not all data can be kept in GL
diff --git a/dlls/winex11.drv/keyboard.c b/dlls/winex11.drv/keyboard.c
index 25621033a61..31b4542c75a 100644
--- a/dlls/winex11.drv/keyboard.c
+++ b/dlls/winex11.drv/keyboard.c
@@ -2135,7 +2135,7 @@ UINT X11DRV_MapVirtualKeyEx(UINT wCode, UINT wMapType, HKL hkl)
 
 			e.state = LockMask;
 			/* LockMask should behave exactly like caps lock - upercase
-			 * the letter keys and thats about it. */
+			 * the letter keys and that's about it. */
 
                         wine_tsx11_lock();
 
diff --git a/dlls/winspool.drv/info.c b/dlls/winspool.drv/info.c
index 3a76bbfa1cf..19c9a9202aa 100644
--- a/dlls/winspool.drv/info.c
+++ b/dlls/winspool.drv/info.c
@@ -1672,7 +1672,7 @@ void WINSPOOL_LoadSystemPrinters(void)
     if(!done) /* If we have any CUPS based printers, skip looking for printcap printers */
         PRINTCAP_LoadPrinters();
 
-    /* Now enumerate the list again and delete any printers that a still tagged */
+    /* Now enumerate the list again and delete any printers that are still tagged */
     EnumPrintersA(PRINTER_ENUM_LOCAL, NULL, 5, NULL, 0, &needed, &num);
     if(needed) {
         PRINTER_INFO_5A* pi = HeapAlloc(GetProcessHeap(), 0, needed);
@@ -4592,7 +4592,7 @@ static BOOL WINSPOOL_GetDriverInfoFromReg(
         strPtr = (pDriverStrings) ? pDriverStrings + (*pcbNeeded) : NULL;
     }
     else if (GetVersion() & 0x80000000) {
-        /* Powerpoint XP expects that pDependentFiles is always valid on win9x */
+        /* PowerPoint XP expects that pDependentFiles is always valid on win9x */
         size = 2 * ((unicode) ? sizeof(WCHAR) : 1);
         *pcbNeeded += size;
         if ((*pcbNeeded <= cbBuf) && strPtr) ZeroMemory(strPtr, size);
diff --git a/programs/cmd/wcmdmain.c b/programs/cmd/wcmdmain.c
index 1d6c29e28cb..52a310869dc 100644
--- a/programs/cmd/wcmdmain.c
+++ b/programs/cmd/wcmdmain.c
@@ -573,7 +573,7 @@ void WCMD_execute (WCHAR *command, WCHAR *redirects,
     strcpyW(new_cmd, command);
 
     /* Expand variables in command line mode only (batch mode will
-       be expanded as the line is read in, except for for loops)   */
+       be expanded as the line is read in, except for 'for' loops)   */
     handleExpansion(new_cmd, (context != NULL), forVariable, forValue);
     cmd = new_cmd;