Prior to this, I had upgraded to Firefox 3.0.2, then 3.0.3. Also, I noticed the Windows update icon in my taskbar. When it finally said Windows was ready to install Service Pack 3, the computer rebooted in the middle of that, so now I also have a failed Windows update.
More often then not, after the machine reboots, chkdsk starts. I tried letting it run once, but on part 2, verifying indexes, it just hung.
I'm at a loss as to what's messing my computer up.
I'm running WinXp, with Service Pack 2. Norton 360 is usually running. I use Firefox 3.0.3 and Thunderbird for e-mail.