When I click play of the files in the timeline. It plays back like frame by frame. It is not a smoothe playback. It used to play back fine, but all of a sudden it's now frame by frame, I am using windows 10. And the slider in the time line does not move.
This may have been caused by a Windows automatic update messing up your drivers. Try manually downloading and installing the latest Graphics driver from you GPU manufacturer's website.
Yeah. I spotted a windows update ready to install when I went to shut down the computer. Clicked on update and shut down. It's playing ok again now. Thanks.