DOH!
SlaveDog, you've f u c k e d up your system!
Repairing the registry won't help because Win2k overwrote some of its HAL (Hardware Abstraction Layer) files with the corresponding ACPI versions.
You
might be able to get your system running again by copying exactly these files from the Win2k CD to your system, but I do
not know what files these are.
MS explicitly warns from changing from APM to ACPI or vice versa in Device Manager. The only working way is to install "over" the existing installation and choose another mode during the installation by pressing F5 when it says "Press F6 to..." at the very beginning of the installation.
Sorry to having to tell you that, but you need to totally reinstall Win2k. You can't even install it "over" the current installation, because for that you would need to start the installation
from within that installation.

nova.
[This message has been edited by nova (edited 16 March 2000).]