Windows 10 Ingame problem after last windows update.

Hello

This started happening after the last windows update.Before the update everything was working fine.I cannot explain it but i made a little video showing what happens.
And it only makes that when i am playing a game(Fortnite,World of Warcraft,CS:GO).It is most obvious with the movement keys like the arrows and ASDW but it happens with every single key on the keyboard.
When holding down a key it reacts as i am pushing it and releasing it non-stop.You can see it in this video: I have reinstalled my keyboard,updated the drivers and even tried with another keyboard but this is not the problem.
If you have that problem or had it before and you know a solution please let me know.

Thank you in advance!