I think your problem could be Sound Card related. I just had to update the drivers on my Creative Audigy Sound Blaster Platinum ex HD. In the blurb regarding the driver's 'Fix's' were these...
Resolves issues of intermittent and random application/system crash when playing games or running applications that use EAX®, DirectSound®, OpenAL and/or ASIO features.
Resolves issue of system crash when running DTM - Device Path Exerciser test in Windows Vista 64-bit.
Resolves issue of volume mapping leading to very soft volume level in systems using Windows Vista with Service Pack 1.
Resolves issue with distortion and noise occuring in systems with 4 GB of RAM or greater.
Resolves issue with OpenAL playback of multichannel formats.
Resolves issue of system crash when performing immediate system shutdown after exiting Battlefield 2.
Optimizations to OpenAL to improve performance in Unreal Tournament 3, DiRT, and other games.
Notice the mention of 'Battlefield 2'