I'm getting random volume changes from my PC, that is the volume will turn itself down usually for a few seconds sometimes for a few minutes and then shoot back up again. First I thought it was poor videos on Youtube but VLC player is do it to video I know are fine.
I'm running Windows 7 Home Premium 64Bit the sound card is on-board the motherboard
I have tried to looking to see if other have this problem, they have but the solutions did fix my problem. The most common cause is in the communication settings, there is an option to cut the volume by 80% when an incoming phone call is detected, I have this option off.
I have also reinstalled the audio drivers
with no luck.
The problem has being going on for sometime and is getting worse.