The appropriate drivers are probably not included in the Windows XP Installation CD so you need to get them from the Toshiba website... click on the link below, then click on the Downloads link, and specify Category, Family and Model... then refine the search by Operating System and Driver Category; (Sound and later Display)http://www.csd.toshiba.com/cgi-bin/tais/support/jsp/home.jsp
1st page; Click on Downloads
2nd page; Select Category\Select Family\Select Model.
3rd page; Select Opearting System\Select Sound\Select Display
Install Speccy if you need more specific system information to download the most appropriate drivers http://www.piriform.com/speccy