Look in Device Manager under "Computer". If it's ACPI, let's change it to "Standard PC":

1. Reinstall Windows 2000 from within Win2K (run Setup on the CD) and (on reboot) press F5 when you see "Setup is inspecting hardware..." and select the Standard PC HAL when prompted. Continue by using the Repair > Fast Repair (no Recovery Console and no Emergency Repair Disk) method. This is the technique I recommend.

2. An easier, but less sure fix is to change the driver for "Computer" in Device Manager to Standard PC and restart. Go to the Driver tab and click Update driver > Next> Display a list...> Show all...> Standard PC. Although this technique works for me, I have heard of systems that will not restart when it's used. A word to the wise...

Afterward, go to Control Panel > Power Options > APM and enable APM.

Bill

: There are 2 USB ports on my desktop computer, I use intel usbready.exe to test them, everything is ok, in device manager, display as:
: +Universal Serial Bus controllers
: |_Intel 82371AB/EB PCI to USB Universal Host Controller.
: |_ USB Root Hub

: The problem is: when I pulg in my USB device(Digital carema or mp3 player, they work well with my laptop usb), computer doesn't detect them at all(nothing happens!). Could anyone point out a direction for me(except reinstall the system), Thanks a lot!