I am using a Logitech M570 trackball mouse for gaming sometimes when I get too lazy to move from the sofa. Anyway I used it fine for a few months, but now whenever I go to play a game the mouse works fine, in the game menu it works fine, once I am in game it becomes unresponsive, laggy, like the signal is being blocked, clicks and rolling the ball don't register. If i go back to the menu from the game it works fine again. I can't think of anything I have installed that would cause this, all I have installed in Windows is Steam, steam games, winamp, chrome, firefox and anti virus. The only thing I installed around the time of this starting to happen was Dragon Age Origins, but I have removed that now. Does anyone have this mouse or have any idea what could cause this? I have uninstalled the drivers and everything and reinstalled but its still the same. EDIT: just tested it in OSX, same thing happens, works great on desktop and game menus, as soon as I enter a game of Counter Strike my frame rate plummets and the mouse becomes unresponsive to movement and clicks.