Windows7 volume when big and small solution

When friends use Windows 7 to watch movies and listen to music, they often find that the sound is big and small. Later, they found that they are opening QQ or MSN and other instant messaging tools while watching videos or listening to music. At the time, the volume will become smaller. How to solve this problem?

In fact, this is a new feature of Windows 7 "Communication". When using a PC to make a call or answer a call, Windows can automatically adjust the different volume. So when there is a message from QQ or MSN, Windows will automatically reduce the sound because of the sound.

Solution:

1. Under the control panel, find: Hardware and Sound-> Sound, there is "Adjust system volume" and "Change system sound" Features.

2. Click on "Sound” or <;Change System Sound", select the "Communication" tab. "When Windows detects communication activity: & rdquo; select as "do nothing" & rdquo;.

This solves the problem of large and small Windows 7 sounds.