Hi,
see if these scans help:
File scans
Find command prompt in the start menu, right click on it and run as admin.
Type:
sfc /scannow
press enter and await results
In the same command prompt and after the above scan has finished type:
dism /online /cleanup-image /restorehealth
Press enter and await results (longer this time).
If the first scan found files it could not repair but the second scan is successful, run the first scan again using the same command prompt box and this time it should repair the files found.
It's possible you may have hard drive problems. This guide will help you run a chkdsk on your drive:
Link Removed
Post any new dump files please.