cannot shutdown computer

I cannot shutdown my computer. The computer begins to shutdown, goes through the Save Settings process, then the Blue Screen pops up with numbers like "0x00009F (0x000100.......)...etc" and the statement: "DRIVER_POWER_STATE_FAILURE". I downloaded Sigverif.exe and now have a LONG list of signed and unsigned drivers. What next? Or is there any other way to isolate the goofy driver? Thanks!

My machine:
Abit NF7-s Rev2 Bios19
AMD xp2400+ 2.4ghz 202x12 cas3
1024mb Samsung PC2700 1@555@300
GeForce4 Ti 4200 128mb (300/540)
Seagate 60gb/40gb ViewSonic P95f+ 19"
Win2k Antec 430