Issues with volume control

[Ryom]

After I freshly installed windows 7 ultimate, my Logitech M510 will change windows volume when holding the left button and scrolling up or down with the wheel. I'm trying to disable this but there doesn't appear to be a toggle for this in setpoint. I know it can be disabled because I didn't have this issue before my clean install! This is terribly annoying in games as my volume fluctuates wildly

Any insights?

 

[Ryom]

Think I discovered the culprit... Audioswitch seems to have a hidden shortcut. Left click audioswitch icon in the system tray, and press F1 to bring up the settings where this can be disabled.