I am on a friend's computer, Windows Vista, and the Logitech optical mouse she has quit working. I changed the batteries, but the red light doesn't come on. So I switched to a USB mouse, made sure it had a fresh battery, the red light comes on so it looks like it is working fine. But when I go to the control panel for "Mouse" it says both of the devices are "working properly" and doesn't give me any options to test or change any settings. I've tried rebooting a few times to see if it will come back. At the moment I am using the number keys to very very slowly navigate the screen. It is unbearable. How to fix?

Is there a tiny button on the usb receiver and underneath the mouse? If there is, try pushing them both at the same time while its plugged in.

Hi, thanks for replying. I can't find a button on the USB receiver (is that the stick I plug in or something else external?), but I have tried pushing the tiny "connect" button on the mouse itself, to no avail...

Yes its the stick you plug in, usually it has a connect button as well. Not sure why the mouse would have one but the receiver wouldn't...

The USB receiver has a light on it, which is on, but no discernible button.. Is there something I can do on the computer itself to get it to work? or is it probably a problem with the mouse? It seems weird that the computer insists the mice are working properly when they are clearly not.. :(

I did find a little button on the USB receiver. Still no luck getting it to work, so I tried it on my laptop and it doesn't work there.. So I think it's the mouse that is broken for some reason. Weird that the computer thinks it's working.. Thanks for your help though! I'll have to try a series of other mice I think..