Same issue for me >4 days now. No response on support ticket, tried 4 different launcher versions.
System: Win10 (completely updated), GeForce GTX 1070 (Updated Drivers), i7-7820HK
Old laptop also running Win10 with same Antivirus setup runs with no problem.
Installed the Update for Universal C Runtime, tried the OPEN_GL variable.
CCPlease let us know what to do.