I was recently working on a Dell desktop computer (not sure of the model or specs as it is not mine) and upon reboot lost control of the mouse. The mouse in question was wireless and at first I thought it could be the batteries, but I tried quite a few, including several that were known to be good. Then I thought it might just need to be re-synched to the receiver, so I tried many times to synch it, with no luck. The keyboard connectivity was intermittant, so I know that at least some of the time there should have been a connection. I also tried a PS/2 keyboard, which worked, and 2 or 3 PS/2 mice, which never did, which makes me think the problem is a little deeper than dead batteries or a connection issue with the wireless receiver. Has anyone come across this issue, or know of something to try, preferably without having to login as I can't even click on the username to login?