Problem is solved for anyone else having similar problems.
GOM player or KMPlayer plays videos smooth & clear,unlike Zoomplayer (my personal choice,dont ask me why.)& VLC.Suprised VLC doesnt play good am sure they will sort it out soon.
Basicaly all the codec packs suck when it comes to windows 7 64bit at this present time in my experiance.
Also just installed an XFI card today.So sound & video running really nice