I had a similar problem. I DL'd SP4 and Win2K wouldn't
get to the splash screen and then jsut stop. After 2 1/2
hrs with a tech, ended up that the service pack overwrote
my video card driver. I had to uninstall teh driver, DL
and new one, and install that new video driver. My system
is still not a full capacity as I can't print or DL any
Windows patches now.