Rick said:
Once System Restore goes bad, the only thing you can do is stop it and
restart it. Start/run services.msc, locate the SR service and doubleclick
it. Click the stop button, then set the startup type dropdown to disabled.
Click apply/ok, then reboot. Reverse the steps to restart it.
Be forewarned that doing this removes all existing restore points, but it
doesn't really matter as they weren't working anyways.
Two points: With the Winsta not found, doing the reinstall as suggested
by babuji is worth it too. And after rebooting with SR Disabled, I
would have Folder Options - View set to show Hidden files, and *not*
Hide Protected mode ones then open the System Volume Information folder
on each drive and delete all the contents - troubles may have resulted
in there being 'orphaned' files still around
And when setting it up again, I would take the Settings for each drive
and review the amount of space being allocated. By default it is 12% of
a drive, and there is reason to think that this is far roo much for its
own good on modern high-capacity drives. I run SR on C: only and find
allowing it 500 MB keeps about two weeks worth of points, which is
about as far back as is worth going