- The **/INTEGRITYCHECK** option sets—in the PE header of the DLL file or executable file—a flag for the memory manager to check for a digital signature in order to load the image in Windows. This option must be set for both 32-bit and 64-bit DLLs that implement kernel-mode code loaded by certain Windows features, and is recommended for all device drivers on Windows Vista, [!INCLUDE[win7](../../build/includes/win7_md.md)], [!INCLUDE[win8](../../build/reference/includes/win8_md.md)], [!INCLUDE[winsvr08](../../build/reference/includes/winsvr08_md.md)], and [!INCLUDE[winserver8](../../build/reference/includes/winserver8_md.md)]. Versions of Windows prior to Windows Vista ignore this flag. For more information, see [Forced Integrity Signing of Portable Executable (PE) files](http://social.technet.microsoft.com/wiki/contents/articles/255.forced-integrity-signing-of-portable-executable-pe-files.aspx).
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