XEloquent _SilenceX

Today we got a new wireless keyboard and mouse and went to install it. It is the Wireless Optical Mouse 2.0. It came with a disk to install a program along. I was stupid and didn't read the directions and plugged in the devices before I installed the program. Then when I installed it and restarted the computer the mouse stopped working. It just died. Dead. Gone. I tried to reconnect the mouse to the little receiver do-hickey and restart the computer. I can't get it to work! I need some help and FYI I'm not COMPLEATLY computer savvy. I'm literate enough to get me by but still forgive me if I ask alot of questions.

I've had almost the exact same problem with the Wireless Optical Mouse 2.0 and I've tried everything.