Hi,
Have you downloaded Launcher directly or via torrent?
Try to use different, from what you've already used, way.
Also, keep in mind following steps:
1) Disable Antivirus/Windows Defender or any malware detectors while launching;
2) Launch as Administrator;
3) Once installed, add an exception to the launcher and/or the folder with the game in the Antivirus, Malware detectors, windows defender, etc. (to the programs that can affect the work of other programs by checking them during the time when they are launched).