Windows® File Protection
What is Windows File Protection and how does it work?
A common issue in the Windows Operating Systems has been the capability for shared system files to be overwritten by non-Operating System installation programs. After the alterations are made, user might experience volatile system performance, ranging from application errors to Operating System collisions. This problem influences several types of files, most commonly dynamic link libraries (.dll) and executable files (.exe). System issues caused by non-standard replacement of system files has been a general problem. By thwarting the replacement of these vital system files, file version mismatches are evaded. Windows File Protection could block all the programs from restoring the critical Windows system files. Programs need not to overwrite these files as they are utilized by the Operating System and by other programs. BY protecting these files, you could prevent the problems with programs and the Operating System.
Given below are working and feature of Windows File Protection:
- Features of Windows File Protection
- Mechanism runs in the background
- System File Checker Tool
Features of Windows File Protection
Windows File Protection (WFP) could defend all critical system files that are incorporated as the part of Windows. WFP also use the file signatures and catalog files that are created by code signing to confirm whether the protected system files are the accurate Microsoft versions. The proper replacement of protected system files hold through mechanisms such as Windows Service Pack installation using Update.exe, the Hotfixes installed by means of Hotfix.exe or Update.exe, Operating System upgrades using Winnt32.exe and Windows Update. If a program utilizes a different method to restore protected files, WFP reinstates the original files. The Windows Installer stick to WFP as installing critical system files and call WFP with a request to set up or restore the sheltered file rather than trying to set up or restore a protected file itself.
Mechanism runs in the background
The first mechanism of WFP could run in the background. WFP could safeguard the system files by running in the background of the computer and identify the efforts to reinstate protected system files. WFP is activated after it gets a directory change notification on a file in a protected directory. After this notification is obtained, WFP could decide which file was altered. If the file is sheltered, WFP looks up the file signature in a catalog file to verify if the new file is the exact Microsoft version. Otherwise, the Operating System could replace the file with the accurate version from the dll cache directory or the distribution media.
The second protection mechanism is that the WFP feature is the System File Checker tool. At the end of GUI-mode Setup, the System File Checker tool could scan all the protected files to ensure that they are not altered by programs that were incorporated by using an unattended setting up. The Windows File Checker tool could also verify all the catalog files that are used to trail right file versions. If any of the catalog files are lost or spoiled, WFP renames the catalog file and recover a cached version of that file from the cache folder. If a cached copy of the catalog file is not obtainable in the cache folder, the WFP feature needs a suitable media to regain a new copy of the catalog file.
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