I watch a bunch of streaming tv and netflix. Sometimes for no apparent reason, EVERYTHING is in slow motion, the picture, the audio, everything. I can shut down the computer for several minutes and then start, again, it will work fine the rest of the evening. Is there any WAY to fix this? I use internet EXPLORER, windows 10. My computer is hardwired to tv, I use hdml cable. thanks.Do you mean the video plays at 50% speed or the video is buffering slowly?No, it isn't buffering, just slow motion. I went to Microsoft site and asked the question, it said to use software rendering instead of the what it was set for. I tried it, the picture was far worse, went back and reset to original setting, worked ok after that.
 If it starts that slow motion business, I shut off the computer and go read for a while. Then turn computer back on and the streaming works fine, the rest of the evening.Twp things to try. Maybe three. These may help find the thing that does this.
Try another computer or mobile device on the same local network.
Boot your r computer with a "Live" Linux CD and watch the same stream.

Also, did yum try logging in with another user account?

My most WILD guess is you have a really odd hardware malfunction. If so, it would show up on downloaded videos as well. 
I agree with Geek, it seems like a hardware issue.  How much memory (RAM) do you have on your computer? Perhaps your system is paging the video on your DRIVE? 

Also since you are on windows 10, download the official netfilx app from the microsoft app store and see if anything changes.