If the Flexor OnScreen Window (introduced in version 2 of Flexor), becomes un-responsive, please check in Windows Control Panel - Add Remove Programs (XP) or Programs and Features (Vista), to see if you have Microsoft Intellipoint Software installed. This Microsoft utility provides some enhanced mouse functions that many users are not aware of and do not use. If you are not making use of the Intellipoint features please de-install the Intellipoint utility and test Flexor again. Removing Intellipoint will not stop your mouse from functioning.