I've got windows 7, 64 bit, on lenovo Z565 laptop. I went on a trip, returned and I apparent left the mouse somewhere. I tried to install several mouses, including a new logitech M510. The computer is connected to the net and windows is set to "automatic updates" per instructions. I put the little doodad into the usb port, which I've always used in the past. It says attempting to update, then message" driver was not successfully installed. Message on every mouse.
On the M510, i went to their website and downloaded the install software first.