Upgrade Hangs

Archived from groups: microsoft.public.win2000.setup_upgrade (More info?)

I have a Dell PowerEdge 2850 with it original system config (Its only 4
months old). It's running Windows 2000 Adv Server and Exchange Server 2003
and Trend Micro OfficeScan Server. I am trying to upgrade it to Windows 2003
Ent Server. It gets to Installing Devices with 37 minutes left and just hangs
there. The system seems like it is moving, I can move the mouse, the Windows
features keeps on updating but the progress bar never moves and it stays at
37 minutes. I had an external hard drive and a tape library connected so I
disconnected and tried again. What can I do to either get by this or go back
to Windows 2000 Server for the meantime?