Rainbow effect and slight blurring on videos

Hey!

I've had a problem for a while but it's starting to bug me now. If I'm watching a DVD on my pc, or if I play a game and I move the camera too fast it has the tendency to blur slightly. It is a sort of rainbow effect which is around light areas for instance a torch beam on a wall, the edges, where it fades from bright to dark would have a sort of rainbow effect on it. Additionally when it happens in DVDs it sort of makes it momenterily blurry. I did have some videos to upload but the forum wont let me so hopefully after a few replies I can!

Thank you for viewing and thank you in advance for any info!

Live long and prosper
 
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