Let's see if we can diagnose this problem...
To Run the SFC /SCANNOW Command in Windows 71.
Open an elevated command prompt. 2. To Scan and Repair System FilesNOTE: Scans the integrity of all protected system files and repairs the system files if needed.
A) In the elevated command prompt, type sfc /scannow
and press Enter.
(see screenshot below)NOTE: This may take some time to finish.
B) Go to step 4.3. To Only Verify if the System Files are CorruptedNOTE: Scans and only verifies the integrity of all proteced system files only.
A) In the elevated command prompt, type sfc /verifyonly
and press Enter.4. When the scan is complete, hopefully you will see all is ok like the screenshot below.NOTE: If not, then you can attempt to run a System Restore using a restore point dated before the bad file occured to fix it. You may need to repeat doing a System Restore until you find a older restore point that may work.5.
When done, close the elevated command prompt.