What is the Windows File Protection Feature?
Windows File Protection (WFP) prevents programs from replacing critical Windows system files. Programs must not overwrite these files because they are used by the operating system and by other programs. Protecting these files prevents problems with programs and the operating system. WFP protects critical system files that are installed as part of Windows (for example, files with a .dll, .exe, .ocx, and .sys extension and some True Type fonts). WFP uses the file signatures and catalog files that are generated by code signing to verify if protected system files are the correct Microsoft versions. For more information on WFP and how it works, see Microsoft Knowledge Base article http://support.microsoft.com?kbid=222193 What are the ramifications of not having the updated version of wkssvc.dll copied to the dll cache? If the updated version of the file wkssvc.dll (or any critical Windows system files) is not copied into the dll cache at the same time as the security update is applied to th
