Didn't you say your new job is as a Proctologist, Sean?
No, seriously, it was painless, but a bit odd seeing your PC working without you working it! I would certainly recommend Remote Assistance (from someone you trust) if you need someone to help out.
Tony, I tried to installed Go Back once before, but halfway through the setting up, the system froze, then it took no less than an hour and a half to uninstall it! Once bitten...
I've never actually had a problem with System Restore before, but I can only guess the reason it failed was part and parcel of the problem, which now seems to have mysteriously vanished.