ok, if you have windows ME (im not sure if it works for any other windows) but when you go to your mouse settings properties in the control pannel and on one of the tabs, you check off locate mouse when ctrl is pressed. I did this when after a restart i couldnt see my mouse, i couldnt use it either, so i went into the control pannel (after using the helpful windows button) i used arrow keys to get to it. I checked to see if my mouse would show, it didnt, so i restarted my computer and it was fixed, but i forgot to un-check the little box ^^'