My PC has XP home. I have AVG anti-virus (last updated yesterday) and use the XP firewall. It worked fine until last night when when it ran very slowly. I tried to shut it down, but it didn't do anything. Eventually I turned the mains off.
When I turned it on again, after the normal black screen tests (memory, etc) it says that something went wrong previously and asks to choose between Safe mode, command line, normal windows, etc. No matter which of these I choose, after a while, the Windows XP screen appears for a few seconds in VGA mode, then a blue message flashes for a fraction of a second (saying something like there was a problem and to protect the filing system it will reboot, it's tricky tring to read something that lasts for such a short while!) then it boots again, but the same problem occurs.
I will try booting from the Windows CD when I get home, but what should I do then?