I am not sure if my problem is related but I will post it here.
After about half an hour to one hour in the game I suddenly hear a loud bang which lasts about a second but will repeat itself at irregular intervals. I can only turn sound of to still enjoy the game a bit.
It happens randomly, so it is not related to a specific moment in the game. I play PvE
When playing the Betas I never had the problem but since got my new computer with Windows 7 instead of Vista it happens.
Computer has realtech onboard sound, Win 7, i3470 processor, HD788o graphics
It does not happen during any other games!