Pentium IV 2.4
HDD 83 GB free
Running Norton Internet Security, NAV (auto update)
About 3 weeks ago I found that XP was taking forever to start up, and once it did everything else runs much slower. On the startup screen the little blue lights (the Cylon eye) would usually scan by @14 times - now it is taking 45 or more before that screen blanks out and I (eventually) get the logon screen.
Sometimes when I shut down XP (from the Start menu) the PC will reboot. This doesn't happen often but usually late at night when I'm tired and just want to go to bed (of course).
I've run Spybot S&D and eliminated any spyware; NAV is on auto-update (although that takes as long as 2 minutes to complete after I log in lately, and seems to run every day, whereas before it only seemed to run 1 or 2 times a week). I also ran (from the V-Com suite, but I still use Norton names) Disk Doctor and Speedisk, as well as their Registry defragger. None of this seems to have done any good.
Maybe I'm living in RAM ignorance, but I would think that 1GB of RAM would be enough to handle most system situations, so although I have checked out Blackviper's System Config page I don't think that is my main problem here. I'm at a complete loss as to what has slowed down my system so dramatically.