Windows File Protection


Windows File Protection

Windows File Protection (WFP) is a technology included in all Microsoft Windows operating systems beginning with Windows 2000 to prevent programs from replacing critical Windows system files. Protecting core system files prevents problems such as DLL hell with programs and the operating system. Windows 2000, Windows XP and Windows Server 2003 include it under the name of "Windows File Protection"; Windows Me includes it as "System File Protection".

When Windows File Protection is active, replacing or deleting a system file that has no file lock to prevent it from being overwritten causes Windows to immediately and silently restore the original copy of the file. The original version of the file is restored from a cached folder which contains backup copies of these files. For the Windows NT family, the cached folder is located at %WinDir%System32Dllcache. Windows Me caches its entire set of compressed cabinet setup files and stores them in the %Systemroot%OptionsInstall folder.

All files which are installed by the operating system (such as DLL, EXE, SYS, OCX etc.) are protected from deletion or being replaced by older versions. The digital signatures of these files are checked using code signing and the signature catalog files stored in the %Systemroot%system32catRoot{F750E6C3-38EE-11D1-85E5-00C04FC295EE} folder. Only certain operating system components such as the "Package Installer" (Update.exe) or Windows Installer (Msiexec.exe) can replace these files. Changes made using any other methods in order to replace these files are reverted and the files are silently restored from the cache. If Windows File Protection cannot automatically find the file in the cached folder, it searches the network path or prompts the user for the Windows installation disc to restore the appropriate version of the file.

Windows Vista does not include Windows File Protection, but it includes Windows Resource Protection which protects files using ACLs. Windows Resource Protection aims to protect core registry keys and values and prevent potentially damaging system configuration changes, besides operating system files.

See also

*Windows Resource Protection
*System File Checker
*Access Control List
*Security Identifier

External links

* [http://support.microsoft.com/kb/222193 Overview of Windows File Protection]
* [http://support.microsoft.com/kb/222473 Registry settings for Windows File Protection]
* [http://www.microsoft.com/whdc/archive/wfp.mspx Whitepaper on Windows File Protection]
* [http://support.microsoft.com/kb/253571 Overview of System File Protection (Windows Me)]
* [http://www.bitsum.com/aboutwfp.asp Hacking Windows File Protection]


Wikimedia Foundation. 2010.

Look at other dictionaries:

  • Windows File Protection — (Система защиты файлов Windows, сокр. англ. WFP)  технология, позволяющая запретить программам изменять или удалять наиболее важные системные файлы Windows. Защита критически важных системных файлов позволяет избежать ряда серьёзных проблем… …   Википедия

  • Windows Resource Protection — is a feature in Windows Vista that replaces Windows File Protection. It protects registry keys and folders in addition to critical system files. The way it protects resources differs entirely from the method used by Windows File Protection.… …   Wikipedia

  • Windows Resource Protection — Windows Resource Protection (сокр. WRP) технология, используемая в ОС Windows Vista взамен Windows File Protection. Она защищает ключи реестра и папки, наряду с критически важными системными файлами. Методы, используемые этой технологией для …   Википедия

  • Windows 2000 — Part of the Microsoft Windows family Screenshot of Windows 2000 Professional …   Wikipedia

  • Windows PowerShell — Screenshot of a sample PowerShell session …   Wikipedia

  • Windows Me — Part of the Microsoft Windows family …   Wikipedia

  • Windows Search — (formerly known as Windows Desktop Search or WDS on Windows XP and Windows Server 2003) is an indexed desktop search platform released by Microsoft for the Windows operating system.[citation needed] Windows Search for Windows Vista, Windows 7,… …   Wikipedia

  • Windows Defender — A component of Microsoft Windows Windows Defender in Windows 7 …   Wikipedia

  • Windows Media Player — A component of Microsoft Windows Details …   Wikipedia

  • Windows Media Center — A component of Microsoft Windows …   Wikipedia


Share the article and excerpts

Direct link
Do a right-click on the link above
and select “Copy Link”

We are using cookies for the best presentation of our site. Continuing to use this site, you agree with this.