ACPI BIOS Problem when Booting Windows 2000 on an IBM Netvista PC
When using a P423 on an IBM Netvista PC running Windows 2000, you may get a message indicating that there is an invalid ACPI BIOS version installed during the initial Windows 2000 boot phase of the PC.
This problem is known to affect IBM Netvista PC's when the P423 (or P424) adapter (TI1420 controller) is installed on a Windows 2000 machine. It does not occur on systems running Windows 9x and Me operating systems. If you are not experiencing this problem then we do not advise applying the following get around.
If you haven't already done so, remove the P423 hardware from the PC, then boot into
Windows 2000 and navigate back to this web page...
Download this registry settings file, select "Open this file from its current location" and click OK. Then click "Yes" when prompted to add the registry information and click "OK" to the confirmation message. Then shutdown the PC and install the P423 in a PCI slot etc..