Firstly, one of the best question would be happy to answer
You can use the tool
Everest Corporate Edition It will show you all the hard-ware parts mfg details of your laptop, so that you can accordingly visit the mfg web page & d/l the drivers.
The above tool is a must for all Hardware Driver problem where we don't know the make or model or mfg. + In some cases in Laptops even if XP detects the driver the hardware doest not seems to work properly so in that case we can know exactly what part or mfg is & accordingly d/l the drivers.
A must have tool for all of you!
Janki