Sound Problem

I have a rather frustrating problem with my sound. When I turn the volume up, the slider falls back down to zero, all by itself.

 

I've replaced drivers to no avail. I've uninstalled so much software that my computer feels naked. The problem persists.

 

This is extremely frustrating.

 

You've got to love those moire patterns though...

 

[Update: I'd like to extend a special welcome to those who landed up here after doing a search on the word "naked" - I hope the disappointment wasn't too great...]

Done