Yesterday evening I installed WavePad and a bunch of other NCH programs (RecordPad, SoundTap, TwelveKeys) everything was working fine, until I turned off my computer, this morning I restarted and now I get no sound, and when I click the sound button on my Taskbar I get that no output audio device is installed, I try to reinstall the ATI high definition driver but this does nothing for the problem. I don't know what else I did to my Windows 7 PC in this time frame other than install these NCH programs that is causing this problem!