The regular stuff, make sure all your drivers are up-to-date. It could also be that your system is running a scan; downloading updates; doing something else. You also need to have the vcredist files installed (check the map FixGameCrash in your OldSquad folder).
Perhaps disable ingame overlay in your NVIDIA GeForce Experience settings (right click the NVIDIA logo down below on the right, on the taskbar).
Maybe I should have said this first; have you tried turning it off and on again?