I don't think it's the mouse, when I go to the Windows list of apps and click on one they all start scrolling down. Also if I click on Task View all the items scroll down so it's a PC problem not a mouse problem.
Turned it off and restarted nothing changed. I updated my Epson software yesterday which is the only change I have made. As opening Apps & features results in them scrolling down I can't click on it and reverse the changes!! AAAARRRGGGGHHHHH