Redirecting problem in iexplore

there is a problem with my friend’s pc…the internet explore is not redirecting the website… eg if i am using yahoo.com …it will not login in …instead its gives an error that cant redirect… or if i log in hotmail then if would be open inbox …when i clicked on inbox nothink happens…and even if i tried to open in new brower by right click …only empty page with no address is opened :frowning: