I've done pretty well with most versions of Windows, making sure that there isn't a ton of crap installed that makes the OS have problems at startup or shutdown.

But since installing Service Pack 3 on this Win2k box, it now takes a long time to shut down. Before SP3, when I clicked "shut down", the OS closed and the PC turned itself off in just a few seconds. Now, it takes (what seems like) minutes before the PC turns off.

Anyone have any tips on how to troubleshoot which POS service/driver/software is slowing the shutdown?