My girlfriend just sent me the following photo:
Apparently that was what greeted her, along with a load of license expiry warnings, when she booted her laptop this morning. She then rebooted to be told it was now 2001. I believe it then died, and it now won't boot. It's a 2009-ish white Macbook running Windows 7 Pro 64-bit.
I'm at work so I'm looking for any ideas as to what has gone horribly wrong before I try to troubleshoot it tonight. All help is greatly appreciated!
Update: Apparently it boots into OS X fine, but still has a system clock of 2001. I'm guessing the motherboard battery died, though I won't know until later.