searching through the forums, seems this is not an uncommon issue. Wireless mouse. Reset mouse. Restart computer. All that stuff
Usualy it takes 20 or so times starting WGT , ending WGT, starting again so the mouse cursor wont be stuck in the middle. Somedays never works. But when it does work normaly, one would have to assume that the mouse drivers were found on start up on that particular launch
Just throwing it out there. Don't really seem WGT is too interested in fixing it, maybe it is just a fringe issue