Is Windows Genuine Advantage part of your Unofficial Win2K SP5 or did you choose to leave that one out? How about the ActiveX control KB908531 that's causing so much grief lately? I'm not sure whether that one is used for Win2K or not but if it is, did you choose to leave it out as well?
I'm hoping you selected only the GOOD updates to incorporate into SP5.
Please let me know whether that's true.
There are no WGA components in any USP