On W8 64 Ultrabook SVD1122APXB, my bluetooth mouse (VGP-BMS11) sporadically loses connectivity when the PC wakes up from prolonged (say overnight) rest. It doesn't always happen but it's really frustrating when it does. Even the bluetooth settings don't allow me to toggle the switch. I would sometimes remove the batteries of the mouse to try to re-establish connection but to no avail. The only solutions seems to be restarting the PC, which I never want to do especially when I have work files running.