Well, now the mouse won't even work in safe mode. I took a PS2 mouse and plugged that in the PS2 slot while I had the other mouse in the USB port. Neither mouse would work, although the PS2 mouse lights up, whereas the other one does not. This same non working mouse works on a different computer.
I guess it's not the new hard drive. Aside from the mouse it seems to work fine. Although, when I ran Maxtor PM diagnostic it froze every time when it came to choosing a drive.
The USB port seems to be working because when I plug in an external hard drive it is recognized. I just can't slide anything onto it with no mouse.
When the mouse was working somewhat I looked in Control Panel and it said the mouse was working fine.