Problem:  Bluetooth mouse suddenly stops working.


Solution:  

  1. Uncheck "Allow computer to turn off this device to save power" box under the "Power Management" tab of the "Intel(R) Wireless Bluetooth(R)" device under Device Manager>Bluetooth
  2. Apply missing driver updates
  3. Reinsert batteries and pair the device again. On the bottom of the mouse, press and hold the Power button. Release the button when the LED light starts flashing. The LED flashes when the mouse is in pairing mode.