no copy n paste option

my frnd is using windowsxp home edition n bcoz of sum virus or spyware or wat evry it may be i caanot copy paste by any means...i tried spybot n cleared evrything but i still cannot find those options neither in Edit menu nor on right click.....

atlast i had to formatt d pc n now d problem has gone....
but still i want to a possible solution to this effect