I ran an sfc (system scan) and it generated the following error:

"Windows Resource Protection found corrupt files but was unable to fix some of them. Details are included in the CBS.Log windir\Logs\CBS\CBS.log. For example C:\Windows\Logs\CBS\CBS,log. Note that logging is currently not supported in offline servicing scenarios."

Here is an excerpt of the kind of fail found in the CBS.log file....

-01-27 13:20:58, Info CBS SQM: Initializing online with Windows opt-in: False
2016-01-27 13:20:58, Info CBS SQM: Cleaning up report files older than 10 days.
2016-01-27 13:20:58, Info CBS SQM: Requesting upload of all unsent reports.
2016-01-27 13:20:58, Info CBS SQM: Failed to start upload with file pattern: C:\WINDOWS\servicing\sqm\*_std.sqm, flags: 0x2 [HRESULT = 0x80004005 - E_FAIL]
2016-01-27 13:20:58, Info CBS SQM: Failed to start standard sample upload. [HRESULT = 0x80004005 - E_FAIL]
2016-01-27 13:20:58, Info CBS SQM: Queued 0 file(s) for upload with pattern: C:\WINDOWS\servicing\sqm\*_all.sqm, flags: 0x6
2016-01-27 13:20:58, Info CBS SQM: Warning: Failed to upload all unsent reports. [HRESULT = 0x80004005 - E_FAIL]

I would attempt a repair with an install disc but I had problems a while back with malware which (amongst other things) prevented me from rolling back to any restore points and which I removed using Malwarebytes (pro version). Since then I tried to do a repair with a Windows 8 install CD after there were still some slight issues, but was unable to do so.

Any suggestions anyone please?

Thanks