go to start type in search for programs and files "regedit" press enter under the folder menu on the left go to Hkey_current_user > Software > Squad > Kerbal space program Click on Screenmanager Resolution Height_h2627697771 change the value data to your normal screen resolution height (mine is 900) then click on Screenmanager Resolution Width_h182942802 change the value data to your normal width (mine was 1600) The game should open normally then go to settings and then change the default screen resolution there.