Whenever I open any video file, no matter what the type and no matter what player I use, the first time I open it I get no video and only sound plays. Now then, when I open a 2nd file, be it the same or a different one, in the same or a different viewer, while the first is still open.. it plays just fine the second time. So I do have a way around the problem and making it work, however it's highly annoying having to open a file twice every time I want to watch something, since I need to first wait for the file to load up and not work before starting it up again to make it work.
Another problem I've been having is that sometimes when I open a folder that contains video files, windows explorer will crash, and continue to do so every time I open a folder after that, until I reset my computer.
The problem with opening video files first started when I upgraded to the newest version of Windows Media Player, I tried reinstalling the previous version I had but that did not fix anything. The second problem just started happening seemingly at random a long time ago.