A video I purchased through itunes is playing with delayed sound (audio and visual is not in sync) - very fustrating to watch!

Recently purchased a brand new computer (windows 8 - with more than the minimum requirements to run itunes) and transferred my itunes library over. After transferring everything i then purchased a new release video through the itunes store and it downloaded without any problems. When I went to view the movie in itunes, it started fine but within a few seconds the sound and picture were out of sync. I paused the video for a few seconds and then when i resumed play it was back in sync but only took a fw seconds for it to all fall out of sync again - very fustrating!

The movie plays fine on my iphone...

Is there anyway of fixing this?

If not i will never be purchasing another movie through itunes!