Movie played from the is not smoothly playing

Hello,
people,i need help.the first time i played a movie from imeem,it was ok.it played smoothly.i visited veoh.com,the movies there said i had to download flash player's latest version,so i did but then after that there would be a pop up to open adobe's website always appearing on my screen.so i deleted it.after doing so,the movie wont play smoothly anymore.that goes for all the other movies here as well.did i do something wrong?i wanna watch movies again smoothly,pls help.im using windows vista home something