Hi,
We do not recommend that you use any Registry Cleaners, Optimizers, Driver Updaters, Tune -Up utilities, etc.
They may do more harm to your operating system than any good that they claim to be able to do.
And this is interesting reading from Microsoft:
"Are registry cleaners necessary?'
http://windows.microsoft.com/en-us/windows/are-registry-cleaners-necessary#1TC=windows-7
Warnings
- Some programs available for free on the Internet might contain spyware, adware, or viruses. Only download and install programs from software publishers that you trust. Even if you trust the website you download the program from, you need to also trust the
publisher of the program. For more information, see When to trust a software publisher.
- We strongly recommend that you only change values in the registry that you understand or have been instructed to change by a source you trust. Be sure to back up the registry before making any changes.
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For problems with computer system files Microsoft does off built-in remedies:
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 -CheckHealthRepair-WindowsImage -Online -ScanHealthRepair-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.
Cheers.