Windows Service packs
and any other relevent information.
Download, install and run Everest Home Edition if you do not know identification details of relevent components. Most important information we need to know is make and model if a 'brand name' computer or motherboard make and model if not.
Installed Windows service packs and updates are also important for things like USB and wireless.
you may have made a very serious mistake by installing windows xp service pack 2 on your compaq.prior to installing service pack to on your comaq pc you need to go to this page and follow the directions on said page: http://h10025.www1.hp.com/ewfrf/wc/genericDocument?cc=us&docname=c00218731&lc=en .the directions lay out which driver updates NEEDS to be installed before installing service pack 2.if you did not update these drivers this could be causing your issue.if you did not install these updates,you need to roll back service pack 2,do all windows updates,all hp driver updates on that page,get your antivirus updated to latest definitions and then in install microsoft windows xp service pack 2.then and only then can you do some accurate symtom diagnosis.before you do this your system would be to unstable to accuraely diagnose issue. :D