hi, i have onboard sound in my computer...here are the exact specs from Everest: motherboard name: Matsonic MS8147C/C+/CR chipset, north bridge: VIA VT8377A Apollo KT400A chipset, south bridge: VIA VT8235 the audio device (i think, because this is the driver installed) is a c-media AC 97 device. the problem i'm having is while playing half life 2 - the game stutters badly when loading and playing sound...if i disable sound completely in the game, it runs extremely smooth. the half life support site says to update my onboard sound driver, but i need help in finding one that is signed by windows xp. i downloaded a realtek driver, but it wasn't signed, and xp gave me a warning saying it could cause my system to become unstable, so i didn't do it. any help? many thanks to anyone who responds.