Hp Compaq Dc7900 Drivers Free Download For Windows 8

1.Driver - Audio

SRS Premium Sound Driver 
ADI High-Definition (HD) 

2.Driver - Chipset
Download 

3.Driver - Graphics

ATI Graphics Driver for Integrated and Non-HDMI Graphics Solutions 
NVIDIA 32-Bit Graphics Driver 
Intel Graphics Driver 
 

4.Driver - Network
Broadcom NetXtreme Gigabit Ethernet  
Ralink 802.11n Wireless LAN  
Intel PRO/1000 Drivers