Gargh.
I did a manual system restore, and had to re-activate windows by phone (it wouldn't even let me into windows to activate online, the bastard device). Then when I got into windows, it told me the system restore failed.
Didn't tell me FUCKING WHY, of course, so I've little choice but to leave my computer on 24/7 to get any work done, which given that it's at the foot of my bed will mean that I'll basically have to start sleeping downstairs.
Also, I seem to have lost 6Gb of hard disk space somehow. Has my computer become self aware and downloaded a small cache of porn? Hmm.
Still, on the plus side, cheesecake tomorrow!