You could try changing dx9 or dx11 in the launcher.

Updating your drivers is always nice, they change often.

Assuming your gfx adapter is nvidia, you may want to install nvidia geforce experience. it's a game settings optimizer. It only works for dx9 at this time but the results are good. There's a button with a performance slider you could explore.

Other brands may have something similar.

Just in case, get Malware byte and scan your computer. It's free and it's a reference in malware detection.