When watching movies or listening to music in WINDOWS 7, if QQ or MSN comes to the message, the volume of the movie or music will suddenly become smaller, making the QQ prompt sound particularly harsh. The solution is as follows:
1, * right-click tray speaker icon - sound (Sound)
2, * click on the "Communication" tab (Communications)
3, * set to "When Windows does not perform any operations when it detects communication activity" (do nothing)
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