I found a solution which has fixed the problem for me:
The solution is described at: Kaspersky remover may triggers VSS error 0x81000203 | Borns Tech and Windows World
and at:...

Dear Dalchina,
Thanks for swift suggestsions. Unfortunately none of them work:
* KB3176934 isn't listed on my system, probably because it is older than my current windows install (July 2018)
*...

I have Windows 10 Home (10.0.11734) on my PC, having upgraded from Windows 7. Everything is working o.k. except that I cannot create restore points, cannot configure system protection and have been...

Just upgraded (via Windows Update) from Win 7 Pro to Windows 10.
Upgrade generally went smoothly, but....
My PC now shuts down very slowly and oddly. The screen and keyboard turn off normally, in a...