IIRC it was almost always the video card driver; I ran W2K for quite a few years into the XP era before moving to XP with 2K theme. Everything was happy except

IIRC it was almost always the video card driver; I ran W2K for quite a few years into the XP era before moving to XP with 2K theme. Everything was happy except the video card drivers, which were often "XP-only" but actually worked fine with 2k.