This is a common issue that used to occur with one of the ATI driver sets and some of the nVidia driver sets. The latest drivers from ATI and nVidia have resolved this. It can also happen if you have older RealTek Audio drivers.
I would try updating my drivers and seeing if that works. If you already have the most current drivers check the Windows 7 installation thread. You might find some answers in there.
Modifié par Pstemarie, 03 juillet 2012 - 02:18 .