Today i am going to give you a very usefull tips that can used by your self
SFC Command for your operting systme like window7 and windows 8 as well.

1. sfc/scannow
2. sfc/verifyonly
3. sfc/scanfile
4. sfc/offbootdir
5. sfc/offwindir

just open cmd by administrator and type one command given just above .
if you want to scan all files of yours os then type sfc/scannow in cmd and it will start to scan all yours os files and if occurs any error it will fixed the error files .

and if you want to verify all files then in same way you have to type sfc/verifyonly
it will verify all necessary files and give you the details information...
     
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