Computer and Software Support


SFC /Scanonce

Scans all protected system files once.

To scan the system files once, do the following

  1. Open Command Prompt (Be sure to open command prompt as administrator. The instructions for Command Prompt will tell you how to do that)

  2. Type SFC /scanonce (There is a space between the SFC and the /)

   

  1. Press Enter

 

NOTES:

  • You must be logged on as member of the Administrators group to run sfc.

  • If sfc discovers that a protected file has been overwritten, it retrieves the correct version of the file from %systemroot%system32\dllcache folder, and then replaces the incorrect file.

  • If the %systemroot%\system32\dllcache folder becomes corrupt or unusable, use sfc /scannow, sfc /scanonce, or sfc /scanboot to repair the contents of the Dllcache directory.

If the above doesn't fix the issue, Run CHKDSK /R /F.