This may sound confusing but let me try to explain what happened. I have 2 computers and an A/B switch. The personal computer (Windows Vista) is never on the internet. I was using the personal computer with a wireless mouse and keyboard. I wanted to backspace and the keyboard wouldn't work. I switched to my internet computer (Windows 7) and the keyboard wouldn't work there either. However, the mouse did work on both computers.I thought maybe the batteries were dead in the keyboard and replaced them. No effect. The lights on the wireless base were flashing and it wouldn't synch. I replaced the mouse and keyboard with a wired set with no effect. I think I then rebooted the machine and the mouse got stuck in the upper right hand corner. The cursor would move erratically when I tried to move the mouse but would always end up in the corner. I can't get the mouse to move so I can get to the computer settings or anything. I went back to the wireless as it is now synched but the cursor is in the same pattern. I rebooted the computer in safe mode with no improvement. This just happened in the middle of using my slide-to-digital copier which I've been using for hundreds of slides with no problems like this. Now both computers are messed up by either keyboard and mouse. Whatever happened affects both the internet and non-internet machines alike. Help!!