turbosoul

i jus got a vista premium and when i try watching movies in it through internet sites or by pasting links in the URL of wmp then i get frames of pictures while watching a movies..the sound is proper but the problem is with the video image..it comes in form of one scen after the other.. i am not quite able to figure out the problem.. moreover i tried to install another version and vsita does not allow me to uninstall, install or repair it.!!some problem.. i don't undestand what i am supposed to do..!! could somebody please help..!! thank you..