first goto control panel|mouse|wheel and make sure the "following number of lines at a time" option is checked if it is then the mouse driver may be messed up.
youll need to goto help and learn a couple of keyboard commands
Specifically how to reboot without a mouse. I think it is shift F4 but I cant remember
To navigate the menus without a mouse press alt then use the arrow keys to get where you want after the mouse disappears.
Goto device manager and unistall the mouse and reboot .
during boot windows will auto detect the mouse and reset it and it should work then.