I recently replaced my old motherboard with another one of the same type, but I am now having problems in re-installing the drivers for my onboard sound card . Each time I try to install the AC 97 driver, my PC will either crash straight away or not start properly on the reboot. I am not sure if it is a problem with: the drivers I have tried, the hardware I am using or if there is a conflict with other software on my PC. Here are my specs: ECS K7S5A 1.0, BIOS: American Megatrends Inc. 07.00T 04/02/01, C-Media AC97 Audio Device, Windows XP Professional Service Pack 2 (build 2600), NETGEAR WG111 802.11g Wireless USB2.0 Adapter Notable software installed: iTunes Version 188.8.131.52 , QuickTime QuickTime 7.0.3, AVG 7.0 Anti-Virus System Version 184.108.40.2069, LimeWire Version 1, 0, 0, 2, NETGEAR WG111 Smart Wizard-Wireless Assistance Version 2, 0, 2, Sun Microsystems, Inc. - Java(TM) 2 Platform Standard Edition 5.0 Update 6 Version 220.127.116.11, ZoneAlarm, Aelitis - Azureus Version 1.0.0. Any help will be much appreciated.