Hi there and welcome
Can you tell me the make and model of the wireless mouse please?
And when did it stop working?
I want to ensure the mouse has not faulted, if you plug it into a different computer, is it functioning on this?
ok, to be sure, can you test the batteries and make sure they are ok please. I just want to confirm they work.
ok... you can get faulty batteries that are new, but if you are sure they are working, when did the mouse stop working? 1 day ago, this morning?