You have to enable ACPI in your bios before you install W2K and make sure that you have a ATX board. Also the bios version has to support this. I have had the same problem when I first installed W2K and then I reinstalled it clean with ACPI in power management (bios setting) set to on. Now it shuts down automatically and works fine. Apparently there is a way to re-install W2K by first making the ACPI in bios on - then - insert the W2K cd and doing a repair install. (I've tried and never got it work) So I did a fresh, clean, formatted drive install and it worked AOK.
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Abit Bp6 - 2 C400 @ 540
Diamond Viper II - 32 meg
Maxtor 7200 rpm - 20 gig
SBLive Value
Panasonic 19" monitor
192 MB Ram @ 133 mhz