Issue with Playback

Yes, as everyone is saying, we need more detailed info on your hardware and video files:

Info needed for a bug report

To expand upon the reply by R Neil Haugen:

What are the hard drives (how many, what kind, what is on each, what capacity, and how full)?

Do not count on Windows to be fully up to date when it comes to device drivers
Go to the vendor site to be sure you have an updated driver for your graphic adapter
Also check (copied link) https://www.tomshardware.com/reviews/gpu-hierarchy,4388.html
.
nVidia Driver Downloads https://www.nvidia.com/Download/index.aspx?lang=en-us
-for all Adobe programs use the STUDIO driver, not the GAMING driver
-To achieve the highest level of reliability, Studio Drivers undergo extensive
-testing against multi-app creator workflows and multiple revisions of the top
-creative applications from Adobe to Autodesk and beyond
.
For a laptop you MAY also need to check for a laptop specific nVidia driver
-SOME laptops require an approved driver from the laptop company, not nVidia
.
AMD/ATI Driver https://www.amd.com/en/support
.
Intel https://downloadcenter.intel.com/product/211969/Intel-HD-Graphics-Family
https://www.askwoody.com/newsletter/free-edition-working-with-the-intel-driver-support-assistant/

What is your media in use, full details ... framesize/rate, bit depth, codec, created by ... what?

What specific hardware does your computer have, as this is crucial data in solving this issue. CPU and GPU esepcially.

Do you have only one drive, or multple drives available?