Hi karan garg & Shashankss995,
We're Sorry to hear about this. Is this happening with any specific media type or with all of them? Does the glitch disappear if you switch Renderer to Mercury Playback Engine Software Only (under File > Project Settings > General)?
For testing purposes, please try installing the Studio driver prior to version 555.85 & let us know if it works properly.
Thanks,
Sumeet