I just tried upgrading my computer last night to 2 gigs of ram from 1 gig. after I installed the ram I kept getting frozen at the windows XP loading screen. I pulled the plug once and restarted it worked fine once but my wireless network card became uninstalled. so I restarted to install it now I have a boot disk failure. can anyone help me? by the way I dont have a copy of XP its a compaq so it was pre-loaded.