according to a review the PC has these features:
Description
Intel Celeron D 340 (2.93GHz) Processor
512MB P2700 DDR Memory
80GB 7,200rpm ATA Hard Drive
16x DVD+/-RW Dual-Layer Writer
AC'97 Audio
Intel Extreme 2 Graphics with 64MB Shared Memory
v.92 56Kbps Modem, 10/100 Ethernet
Which OS are you running? I can't believe that there wouldn't be a driver for an intel onboard video.
For audio you can try to find which chip is used and look up the driver. Same for the modem. Open the PC and have a look.