I have a Dell computer running 64bit Windows 7. I have been able to connect a Logitech bluetooth M555b mouse until recently although from time to time I would have to reconnect when it would stop working. The last time I tried to reconnect, the add a device window reconized the mouse but when I tried to connect, the window goes into a continous state of trying to connect with the connection icon indicating that it is attempting the connection. This morning, I restored the computer to a previous point. The mouse was connected and worked for about 15 minutes then stopped. The show bluetooth window indicates the mouse is attached. When I uninstall the device, I get the same problem as above. I do have the device driver set so that windows does not turn buletooth off.