gl setup subsystem please help

very new pc gamer.
windows me edition with geforce 2.
quake3 & soldier of fortune run fine untill about 1-2 months ago, when i try and play the two games gl setup subsytem appears.
tried to download latest drivers from nvidia & gls main web site but that doesnt seem to work and also looked at the ;dva or whatever its called,but i cant find the line. now im just getting a little frustrated because ive also bought medal of honour and that doesnt load. please please can someone help me, and when replying keep it to basic computer talk as im no pc wizkid here many thanks!!!