I have a IBM pentium 4 desktop with XP and on start up I get a long beep, then two short beeps on start up. I think that it might be one of my Nvidvia Vanta Lt monitor cards. I removed the 3 cards to vacuum dust off of them. I reinstalled them and updated the drivers and they seem to work fine, but I occassionally get a message saying that Microsoft wants to download a fatal error report concerning the monitor card. I have scanned for viruses, trogens and such and have a firewall and spybuster.