An Error Ocurred while trying to copy a file: The source file is corrupted.

I've tried:

Restarting;
Reinstalling;
Adding maplestory / installer as exception in windows defender + firewall;
Updating video card;
Re-downloading and then reinstalling everything;
Removing windows defender and firewall completely;




No luck.

 

I can ignore this step and start the game, but it just gives me this error on the login page:

 

Here it is





Its a firewall exception thing

I also included it in the firewall rules multiple time, for some reason I cant paste an image now.

 

Still:



I added everything into a single screen shot, but even tho I have the entire folder as exception on windows defender, the installer and the exe.