Yes, like I said in post 1: I have the Lav codecs installed. I downloaded them from the gameex homepage.
And like I said: everything is slow. It feels like the program is running with 10fps or something. When I press down for example on the controller/keyboard, it takes a while before the cursor moves down and it moves slow. Also videos are stuttering a lot and the sound of the video is sometimes faster or lags behind the video.
I try to record a video tomorrow when I have the time.
I was using windows 10 before too, but I had the same issues