02-22-2011 07:26 PM
Windows Xp x64 is not a supported OS on the dc7900.
Accordingly, you are going to have to search for any drivers you need in cyberspace.
Here is a XP x64 bit Soundmax driver for HP notebooks you can try.
I am concerned that you need to install the MS UAA driver first, and I cannot find an XP x64 bit version for that anywhere.
Good luck with your installation.