I bought a Logitech optical mouse (not cordless) and when I first plugged it in it worked just fine. Since it worked as is, I didn’t bother downloading the software that came with it. After turning the computer off and on again, it wouldn’t work (the cursor on the screen wouldn’t move). If I plug the old mouse back in with the computer still on, it won’t work either. If I shut the computer off and plug the old mouse back in, then turn it on, the old mouse works fine. If I then unplug the old mouse and plug in the new one, the new one will work fine again. I just can’t turn the computer on with the new mouse plugged in.
I though maybe this was because I didn’t download the software, so I downloaded it. Didn’t help. Any suggestions (other than calling Logitech, which I’ll do tomorrow if no one here can help me)?