The phone. See what happened when a member chatted with HP at http://forums.cnet.com/5208-7587_102-0.html?forumID=69&threadID=271360&messageID=2699006#2699006
Be sure you share what methods you tried so we don't repeat those.
I have a Toshiba Satellite A135-s2306 that was running Vista Home Basic until a few days ago. I just loaded it with XP Pro SP2, but I'm missing a whole lot of drivers. All of the Vista drivers are on the Toshiba support site, but nowhere can I find the XP drivers for my hardware.
the Vista drivers are here.