New
#11
I didn't have to change anything at all manually. The only thing I did was Toggle Automatic Time Off and then back on again.
If that hadn't worked though I would have just manually changed the time.
You say that you manually changed the time on your PC so that should have sorted it out for you anyway without touching the Automatic Time Setting at all.
It doesn't matter now anyway...you've got it sorted
Oddly enough one of my PC's did that when it hit the first day of BST. Suddenly the clock was displaying -1 hr. I just went to the clock page and asked it to update the time from the servers and it was fine. I assume there is some sort of issue with the time servers that caused the problem. I think it only accesses the time servers once a day unless you tell it otherwise.