When Windows 2000 enumerates devices, some PCI-E devices DO NOT work.
If you open Device Manager, a a yellow exclamation mark appears next to the device. When you view the device Properties, you receive:
This device cannot find enough free resources that it can use. (Code 12)
To workaround this problem, shutdown and restart your computer again.
NOTE: This behavior DOES NOT occur in Windows XP, Windows Server 2003, and later operating systems.
For additional information about Device Manager error codes, see: