![]() ![]() ![]() The first mechanism runs in the background. The WFP feature provides protection for system files using two mechanisms. The Windows Installer adheres to WFP when installing critical system files and calls WFP with a request to install or replace the protected file instead of trying to install or replace a protected file itself. If a program uses a different method to replace protected files, WFP restores the original files. Operating system upgrades using Winnt32.exe Hotfixes installed using Hotfix.exe or Update.exe Windows Service Pack installation using Update.exe Replacement of protected system files is supported only through the following mechanisms: 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. WFP protects critical system files that are installed as part of Windows (for example, files with a. Protecting these files prevents problems with programs and the operating system. Programs must not overwrite these files because they are used by the operating system and by other programs. Windows File Protection (WFP) prevents programs from replacing critical Windows system files. This article describes the Windows File Protection (WFP) feature. Description of the Windows File Protection feature ![]()
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