Computer halts after boot

[Big Nerd]

Hy,
Yesterday I turned on my computer, it booted normaly, I logged in, and one minute after it just stoped!!! I couldn't use the mouse, the keyboard wouldn't work, it just halted right there. Does anyone now how can I solve this? The computer is a P4 at 2,8 GH, 512 Mb RAM, running Windows XP Home Edition SP2.

PS.: I am writing this in my dad's PC.

[Nostradamus]

Hard to give advice on this since you provide no detail. What did you do before that started happen?  for example have you installed anything new? or did anything different?
Does this happen eveyr time you restart now? does it just freeze?

If you didn't do anything new or different, First general advice is boot into safe mdoe and open Event Viewer and look for error messages from the time it happened. This could shed light on what happened.
If nothing is there you could try a System Restore point.

More info will really help.

[Tuomas]

Stop "booting" it, you'll break it. LOL, sorry

[Radiant]

Try booting in safe mode.

[woodz]

like whats been sed try safe mode check the event viewer
you could also check what is actually booting up by clicking start> run and enter "msconfig" ...click the last tab "startup" and see what programs run as you log in, its normally anti virus software, printer managers, office... stuff that you would expect

if anything looks suspect uncheck the box and see if the pc will start normally, or do a search on the file name to find out what it does

[Big Nerd]

Well, I booted in Safe Mode, did a litlle cleaning (got rid of alll the old crap in the PC), and Its's OK again. I am writng this from MY PC!!!
Thanks guys!

[woodz]

Apparently the XP help system can throw a wobbly and start using 100% of the system resources which will more or less render your desktop useless, there is a hot fix for it and effects pre service pack 2 releases