Repair Windows System Files

1. Enter Command Prompt. (How? Click here. Vista user should enter command prompt as Administrator)
   
   
2. type sfc /SCANNOW and press enter to scans integrity of all protected system files and repairs files with problems when possible.
   
   
3. type sfc /VERIFYFILE=c:\windows\system32\kernel32.dll and press enter to verify the integrity of the file with full path . No repair operation is performed. Replace the path of the file to verify the file you like.
   
   
4. type sfc /VERIFYONLY and press enter to scan integrity of all protected system files. No repair operation is performed.
   

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