One day i booted windows 7 64 and now my left mouse button is acting like my right ! If the click the desktop right the left key the properties menu pops up. Also if i am on line and click a link the copy/paste/delete menu drops down. I have read others having issues like this but no solutions. I am just reaching out for help. I couldn't figure it out so i am on a cheapy mouse right now. I want my G500 back !