How to Determine Which Video Driver Is Loading in Windows XP (Q314854)
This article describes procedures that you can follow to troubleshoot difficulties with video drivers when you start your computer in Windows XP. Specifically, the article describes how to find out which video drivers are loading.
If the video driver is not loading correctly, another program may have replaced some files. These symptoms point to that cause:
The system continues to default to VGA mode or only boots in VGA mode from the Boot menu.
The video driver is not loading properly.
Click here for the kb article from Microsoft.