I was using my ibm computer when i noticed that my mouse wasnt moving very well. So i shut down the computer disconnected the old mouse and plugged a spare one in. When i rebooted my computer a message came up saying 8603 Pointing device error. When it had finised counting the memory it took me into the bios. I noticed that next to the word mouse it said not installed. So i changed it to installed and saved and exited the bios. When the computer restarted it did the same thing and when i went back to the bios it had reverted back to not installed. So i turned off the computer again and reconected the other mouse but it still didnt work. Any suggestions on what might be wrong?