Hey, Adrian! I just want to check for some basics first! Are you playing in windows fullscreen (borderless windows)? If so, does it help to try fullscreen mode? Would you happen to have or had razer on the system previously? If so, please try the suggestions on this post.
Let’s take a look at a DxDiag file. Copy and paste the text file created and paste it between two ~~~ like so:
~~~
DxDiag Here
~~~
If you have issues pasting here, use Pastebin and post the end of the link. (ie. 123456 for pastebin.com/123456)