dissable accessability/ enable keyboard, mouse functionc

i added the accessability functions..narrator, magnifier,
and onscreen keyboard..i have no idea how this
happened..but npow i can not use my keyboard and
mouse...i can use the keyboard only as it is set up in
the accessability mode..i have done several system
restores...and i have put the recover discs in that came
with my pc..many times..but it keeps restoring the
accessability functions...i have to get rid of
this ...can anyone help me please..many thanx, mary lou