Windows 7 backup/restore not working

C:\Windows\system32>

sfc /scannow:

Windows Resource Protection did not find any integrity violations.

The above vssadmin shows this in application log:

Volume Shadow Copy Service error: A critical component required by the Volume Shadow Copy service is not registered. This might happened if an error occurred during Windows setup or during installation of a Shadow Copy provider. The error returned from CoCreateInstance on class with CLSID {e579ab5f-1cc4-44b4-bed9-de0991ff0623} and Name IVssCoordinatorEx2 is [0x80040154, Class not registered
]. 

Operation:
   Instantiating VSS server

I've tried most of the options here:

https://social.technet.microsoft.com/Forums/office/en-US/2b1f44e0-725a-4fc5-bc1d-69437871fe90/wierd-volume-shadow-copy-service-errors?forum=winserverfiles

and here

http://social.technet.microsoft.com/Forums/en-US/w7itprogeneral/thread/5587519b-6a84-45b0-9948-36f4f3416379/?prof=required]

(eg deleting com3)

Without any change.

I would like to get the restore point capability back.

Any ideas or suggestions?

Thanks.