In today's (unusually late) DOOM 3 newsbit, a post on
PlanetDOOM confirms from
Activision that DOOM 3 will not run under Windows 98 or Win98SE, but that
Windows XP or Windows 2000 will be required.
Rictor Yes windows XP is much better than Win 98 but if you do not intent to play doom 3 and you do not have major problem with your 98 keep it! But if you have a deal for winXP, go for it you'll be more than happy