OK, unlike Windows where the GUI is (apparently) completely part of the system, Linux uses something called X (or X11, or X Windowing System...take your pick
) to display graphics and control input devices (keyboard/mouse) when in graphical mode. There is a file (called XF86Config) that holds all the settings and things for your X sessions.
Now, to get things working, you could either tweak the file manually (which can be found in the directory
/etc/X11), or you can use some X tweaking program.
Try closing your X session and running xf86config:
- Open a terminal/console (the thing that looks like a dos box in Windows)
- Change to the root user (type su root and then type root's password)
- Type in init 3 (this drops you out of X and into a normal text console session).
- Then type xf86config, or xconfigurator.
Alternatively, you could take a look at the file, and post here the section(s) about your mouse.