I've been using a Bluetooth mouse with my Win7 laptop. However it intermittent looses connection. I tried different ways but it does not seem to fix the issue. Change battery, update my laptop wifi / bluetooth driver. One nice day, I ran through this post and it is fixed.
Steps: Device Manager > Bluetooth Radios > Thinkpad Bluetooth > Power Management > Uncheck "Allow The computer to turn off this device to save power"
