Running Windows 98 on An Athlon 1 GHz CPU. Often, computer will freeze up just before “Verifying DMI Pool Data” message. Can’t boot from floppy or to command prompt when this happens. All cards, connectors and RAM have been taken out and reseated and ribbons and cables replaced .The computer will boot occasionally, but will lock up if left unattended for a long time. HD is good, so are sound, network and video cards. Help?