Don't really know if this is a mouse (relatively new Logitech Cordless Optical Trackman) or a computer problem. But lately, when clicking the right click, I get bief flashes of the content menu. Same brief flashes when selecting Start or Show Hidden Icons on the taskbar. Also, when clicking the trackman's programmed buttons, they don't work. Resetting or connecting button on the trackman or transceiver don't seem to correct situation. Restarting the computer brings everything back to normal functioning of the trackman.