Try this:
1. Go to your sound device properties (Speakers in my case):
Right-click the speaker icon near the clock and then click ‘Playback devices’ to get there. Click ‘Properties’ and then click the ‘Advanced’ tab.
2. Un-check the following two boxes, then click ‘Apply’:
“Allow applications to take exclusive control of this device”
“Give exclusive mode applications priority”
Don’t know if that will help, but those settings can cause sound problems in some programs.
Thanks for this tip. It was the solution to my sound problems.