Windows Update left system restore unusable

I am not sure this is the correct forum for this. If not, please redirect me.

Windows 8.1

After last Windows Update I get on restart: Error from WerFault.exe:
"instruction at 0xcd730bff references memory at 0x0000000. Memory location cannot be written."

I think the Registry was left corrupted by Windows Update.

This error is preventing me from running Windows Defender, from running System Restore, from installing a Registry Cleaner, and much more. The Windows "Consent UI" is throwing the "0x0" error when I try to do the install the Registry Cleaner.

One idea I have is to load System Restore in safe Administrator mode, then restore the pre-Windows Update version.

Anyone have info on how to get to System Restore Administrator in safe Administrator mode? Any other ideas?

Thanks.

Try sfc/scannow to repair possible corrupt files. Run DISM if needed (bottom of page) and let us know results.

http://www.eightforums.com/tutorials/3047-sfc-scannow-command-run-windows-8-a.html (Try Option 2 first)

May want to try to scan with Malwarebytes and uninstall upates if possible. Final option may be a System Refresh which you would not lose any files, possibly some add-ons.

from installing a Registry Cleaner

Click to expand...

Many will advise registry cleaners are not a good idea.

No way to fix

Thanks for suggestions about software to download to maybe fix this. But the problem prevents execution of a download. Not only that, but the OS refuses to let me boot from a CD drive where I could have loaded a bootable image with fix software.

Only solution was the 'refresh' my PC. So I will be spending next few days reinstalling all my apps.

Lesson: Windows Update can corrupt your OS in a way that leaves you dead in water no matter how much you backup stuff.

Thanks for suggestions about software to download to maybe fix this

Click to expand...

SFC/scannow is a command prompt, not a software download.

Refresh is good option to insure registry is back to specs. As stated, many advise against registry cleaners.