Go back to the Asus web page and see if they offer Windows 2000 server drivers. If not, disable the USB ports.
Here i have a comp with an ASUS Motherb. P5B deluxe running win 2000 server with spk 4 with a core 2 duo E6600, RAID 1 250 GB HD 2 GB OF RAM, i had this server ready to use for a while and now that i need it to use it, i am getting in the system tray that icon that shows that a new device had been found and of course when i clicked on it it shows USB DEVICE with a yellow mark, i don't have any device connected to any of the usb ports but anyway if i insert one on the port it won't be recognized cause when i went into the yellow mark usb device properties and select update driver, it says failing,it is like is not a driver installed but windows is trying to install the default usbxxx.inf file driver but still does' not work, all the usb controllers seen to be ok, the usb root too not yellow mark on them, normally the computer should find a usb device if i insert one into the usb port but i did not so in fact it does not matter if i insert a flash drive into one of the 8 usb port i have in this computer anyway does not see them, but the problem is that why is searching for a usb device even when i don't have plugged one into the usb port, something is wrong with OS , or something is wrong with the motherb ? should i run spk 4 again ? , clean install of win 2000 server ? need some suggestion here please, should the usb host controller has IRQ 9, or can be any irq assigned by the system ? any other thing to check under bios setup ? oh by the way i have the lates bios installed too bios version 1238. any help is very appreciated, i am trying to avoid to do a new install