Wireless mouse no longer recognised

I've just been away from home for a few days without my bluetooth mouse. Now i'm back, my laptop won't recognise that the mouse is there. What should I do? (I've changed batteries, BT is on etc.)

 

If by that you mean use the "set up Bluetooth dveice" option then yes, and no luck. My laptop is also set as discoverable.

 

Problem solved - I restarted. Seems to be the solution to most things.