ok windows XP on installation of software.....askes installer if you have any SCUSSI devices hit enter now....if you dont then it doesnt install this option.
if you have no SCUSSI CARD in the computer....would be SCANNER, OPTICAL DRIVE, HARD DRIVE(very unlikly if its a dell) or youre RAID is setup(whole nother set of problems)open the box up, look at all the attached cards, most will have VIDEO CARD, this is up top and connects to your monitor. MODEM, easy to figure out, phone lines connect to it. TV CARD, will have a connection on the back for cable. SOUND CARD, will have jacks for speakers out back. now if you have a SCUSi card in there it will have a male plug on the outside of computer....the size of youre printer port, but with PINS....if you dont have this and youre not running RAID, THIS COUPLES multiple hard and accesses them as one hard drive....i think.
2. call dell and ask why you have SCUSSI on this computer.
3. go into options on that device manger and make it DISABLED. if your computer works ok this way you can go back and delete it or just leave it disabled.