Hi,
Each Method/step below progresses to the next if the first does not fix any corrupted files that are found, etc.
Have you read this Microsoft information about repairing corrupt system files and errors?
"Use the System File Checker tool to repair missing or corrupted system files"
https://support.microsoft.com/en-us/kb/929833
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And these eightforums.com Tutorials are very detailed for problems resulting from SFC Scan:
"How to Run "SFC /SCANNOW" Command at Boot or in Windows 8 and 8.1"
http://www.eightforums.com/tutorials/3047-sfc-scannow-command-run-windows-8-a.html
Read this Section there in conjunction with the rest of the information they give in above link.
Note
If SFC could not fix something, then run the command again to see if it may be able to the next time. Sometimes it may take running the
sfc /scannow command 3 times restarting the PC after each time to completely fix everything that it's able to.
If not, then run the
Dism /Online /Cleanup-Image /RestoreHealth
command to repair any component store corruption,
Repair-WindowsImage -Online -CheckHealth
Repair-WindowsImage -Online -ScanHealth
Repair-WindowsImage -Online -RestoreHealth
Restart the PC afterwards, and try the sfc /scannow command again.
If still not, then try using OPTION ONE above to run the
sfc /scannow command at boot
If still not, then you could do a refresh of Windows 8, or 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.
If still not, then you can use the steps in the TIP box in the OPTION THREE section to manually replace the files that SFC could not fix.
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"How to Refresh Windows 8 and Windows 8.1"
http://www.eightforums.com/tutorials/2293-refresh-windows-8-a.html
Refreshing your PC goes like this:
- The PC boots into Windows RE (Recovery
Environment).
- Windows RE scans the hard drive for your data, settings, and apps, and puts them aside (on the same drive).
- Windows RE installs a fresh copy of Windows.
- Windows RE restores the data, settings, and apps it has set aside into the newly installed copy of Windows.
- The PC restarts into the newly installed copy of Windows.
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"How to Reset Windows 8 and Windows 8.1"
http://www.eightforums.com/tutorials/2302-reset-windows-8-a.html
"When you reset your PC, the drive will be completely reset, and all your apps and files will be removed from it. Windows 8 will be reinstalled, and you'll need to change any settings and reinstall any apps that you want to
get back after resetting. If you know if any files that you don't want to lose, then you should back those files up before starting the reset"
Cheers.