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Using SFC

system files checker

  1. Belahzur
    Using SFC To Check System Files

    System File Checker (SFC): What is it? The System File Checker is a small utility in Windows that allows us to check sysem files for damage, such as malware infections or when a system file has become corrupt.

    What does it do?

    It scans all your system files to check they are in working order, and attempts to replace them if it finds problems with some. It will attempt replacing them by using a backup copy somewhere on the machine (i386, etc), and if there isn't a backup copy found, it will ask you to insert your Windows XP / Vista / 7 CD so it can get a copy off the disc.

    How do I run the scan?

    To do this simply go to Start > Run. Type in cmd hit enter. When the command prompt open, type in the following command, note the space between the c and / :

    sfc /scannow

    This command will immediately start the Windows File Protection service to scan all protected files and verify their integrity, replacing any files if it finds a problem.

    There are a few other sfc functions as well:
    sfc /scannow - Scans all protected system files immediately.
    sfc /scanonce - Scans all protected system files once.
    sfc /scanboot - Scans all protected system files every time the computer is restarted.
    sfc /revert - Returns the scan to its default operation.

    For Windows Vista / 7 users:

    To do this, go to Start, in the little search box, type in cmd and let it find the command prompt. When it has, right click it, select Run As Administrator. When the command prompt open, type in the following command, note the space between the c and / :

    sfc /scannow

    [​IMG]

    That concludes this tutorial.