(If you are running Windows 7 or Windows Vista, skip to Step 3.)
If you are running Windows 10, Windows 8.1 or Windows 8, first run the inbox Deployment Image Servicing and Management (DISM) tool prior to running the System File Checker. To do this, do the following as your appropriate: Run the System File Checker tool (SFC.exe)
Though the steps below might look complicated at first glance, just follow them in order, step-by-step, and we’ll try to get you back on track. If some Windows functions aren't working or Windows crashes, use the System File Checker to scan Windows and restore your files.
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