Hello @SonTom,
Is there any antivirus program running on your machine that could be blocking Insync’s execution? Could you try white listing the Insync executables (%appdata%\Insync\App\Insync.exe and %appdata%\Insync\App\lib\Insync-cef.exe) in the antivirus and see if it works.
Please send the Insync logs to support@insynchq.com if you are unable to run the app.
Thanks