Windows® 7 System File Checker Tool
Learn more about System File Checker Tool for Windows 7 and its role in checking and repairing the files.
If any of the Windows system file are missing or corrupted, the system may not behave in a proper way. As a result, some Windows system files may not work or the system itself may crash. To overcome this Windows 7 has an in-built tool called System File Checker (SFC.exe). This tool scans system files and fixes or replaces system files. This System File Checker is integrated with Windows Rescue Protection. This in addition to protecting system files also protects registry keys and folders. Normally this is used when there is corruption in system files or any hacking is done to your files or wrong customization of Windows result in loss of system files. The System File Checker Tool will scan and replace missing files. This System File Checker Tool can also scan specific individual files. If Windows installation is not possible then scan can be done against an offline Windows installation folder to do the repair work.
Here is a description of the features of Windows 7 System File Checker Tool:
- Working of System File Checker
- Starting a System File Checker
- Repair file without using SFC.exe
Working of System File Checker
First it scans to find any problems. Next it will attempt to replace the corrupted or missing files with files from DLL Cache (%WinDir%System32Dllcache). If there is no file in the cache or cache memory itself gets corrupted then it will ask the user to insert Windows installation disk. Or you can provide the network installation path. Files are protected using Access Control Lists (ACLs).
Starting a System File Checker
Run command prompt as an administrator. This is obtained in Start/All Programs/Accessories and right click 'Command Prompt'. Then click 'Run as administrator'. Then type the command 'sfc/sccannow'. Then press 'Enter'. System File Checker will start checking now. This will take some time to scan. It will fix system file error. When the system scanning is complete, it will display result whether there are any issues with system files.
Sometimes System File Checker tool cannot repair certain files. In that case imply the following procedure. In the command prompt type '/f Path_And_File_Name'. For example, consider the format '/f E:windowssystem32jscript.dll'. Next to grant administrator full access type the sample format. Icacls Path_And_File_Name /GRANT ADMINISTRATORS:F. Type the following command to replace corrupt file with a good copy. Copy Path_And_File_Name_Of_Source_File Path_And_File_Name_Of_Destination.
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