Re: XP constantly restarts at boot, before the login screen
First, what you can try booting it into safe mode. I have had bad experiences with 'last known good configuration' so I dont reccomend that.
Can you boot into safe mode? If not, try opening up the case (with the power turned off) and then taking out the battery on the motherboard. I really think that will have no effect, but you never know. Leave it out for 30 seconds.
After that, take out the 512mb ram and 256mb sticks (I assume?) and if you only have one stick, then just kind of clean and reseat it.
But I had a similar problem. It turned out that I had a conflict in msconfig. I had turned off my Pc for about a week and went on vacation. When I get back I find my computer corrupted etc.
Safemode worked for me, and in safemode I didnt the following
start > run > msconfig > and select 'normal startup'
./l ,[_\_\ ],
l---L – ()lllllll()-