piattj said:
The weird thing is that I've since reverted to using my account with admin privileges and it's all working OK again.

I started preparing to create & shift to a new account but tried my original account and, for the past day or so, all has been working just fine.

Odd...

Not sure if I should be pleased or suspicious...
Maybe pleased is appropriate, with a touch of wariness.

Could be that Windows corrected the problem, but I'd be wary for quite a few logons...