I use an office computer with Windows 7, which I set up myself. The computer is part of a workgroup with two other colleagues.
As with my home computers, I set up two accounts - one for me as Administrator, and one for me as User. So I normally log on and work as User, and only go into the Admin account if I need to make changes which require Admin provileges.
For the Admin account I created a password (and also put in a reminder clue).
Today - after a week's absence during which a new router was installed in the office - I logged in as User. The account opened, but I then got a popup which asked me to note whether the 'new' network was home, office or public. Fair enough - but then a UAC popup appeared asking me to log in as Administrator (and put in the password) to proceed.
I put in the password (which I know well!). It wasn't recognised, even after several attempts.
I then closed down and restarted and tried to log in to my Admin account. The 'enter password' window appeared, but again, the password was not recognised. The reminder clue appeared after a couple of attempts - and the clue is indeed the one that relates to the password I had created.
So.... the password is correct. I double-checked the obvious things like caps-lock, and am confident I am using the right password. Why is it not being recognised? And more important, how can I resolve the problem? I can still use the computer as User (and everything works). But I cannot now log in as Administrator.