Repair Windows Operating System Files
By Using SFC /Scannow Command
By Using SFC /Scannow Command
If a Windows Resource Protection (WRP) file is missing or is corrupted,
Windows may not behave as expected. For example, some Windows functions
may not work, or Windows may crash.
Follow these steps for using sfc with the scannow option to repair important Windows files:
Follow these steps for using sfc with the scannow option to repair important Windows files:
Here's How:
Time Required: Using sfc /scannow to repair important Windows files usually takes 5 to 10 minutes.
1 Open Command Prompt.
Important: You must run Command Prompt as an administrator in Windows 7 and Windows Vista to use System File Checker.
2 Once Command Prompt is open, type the following command and then press Enter.
sfc /scannow
Note: There's a space between sfc and /scannow.
3 System File Checker will now verify the integrity of every protected operating system file on your computer.
Note: In some situations, especially in Windows XP and Windows 2000, you may also need access to your original Windows installation CD or DVD.
4 Restart your computer if sfc /scannow did actually repair any files.
Note: System File Checker may or may not prompt you to restart but even if it doesn't, you should restart anyway.
5 Repeat whatever process caused your original problem to see if sfc /scannow corrected the issue.
1 Open Command Prompt.
Important: You must run Command Prompt as an administrator in Windows 7 and Windows Vista to use System File Checker.
2 Once Command Prompt is open, type the following command and then press Enter.
sfc /scannow
Note: There's a space between sfc and /scannow.
3 System File Checker will now verify the integrity of every protected operating system file on your computer.
Note: In some situations, especially in Windows XP and Windows 2000, you may also need access to your original Windows installation CD or DVD.
4 Restart your computer if sfc /scannow did actually repair any files.
Note: System File Checker may or may not prompt you to restart but even if it doesn't, you should restart anyway.
5 Repeat whatever process caused your original problem to see if sfc /scannow corrected the issue.
