Hi remedyz,
Are you using windows 10?
You'll have to include your "tantra folder" to "EXCLUSIONS" on your "windows defender" and your "anti-virus."
You should also "right-click" on the three programs (HTLauncher, Tantra and Start K13). Right click on each seperately and go to "compatibility" tab. check on the "run as administrator.'
You should do the first step first.
The reason is that your defender and anti-virus is detecting that the program is a virus and that is automatically putting the said 3 exe's to quarantine or deleting them.
Ciao.