If that doesn't resolve your issue, then you may try the following options.
• Run the game in compatability mode
• Update your Display/Graphical Drivers
• Update your Windows Version
• Add an exception for the client in your Firewall and Antivirus
• Clear out your Physical Memory or Ram to free up space
• Terminate processes you don't need in the Task Manager
Please also try checking the Windows 7 Guide/Windows 10 Guide for the system requirements and information that may help solve your issue.
Hope this helps and have a great day!
Did the fullscreen thing but now i get another error, this time it`s
Switching to resolution 640x480 failed, trying lower one
All resolution switches have failed
Screen: DX11 could not switch resolution (640x480 fs=0 hz=0)