Improper drivers are the #1 cause of failure. Ensure MTK VCOM drivers are properly installed for MediaTek devices.

The V165 release introduces updated security patches and wider chipset compatibility, allowing technicians to work smoothly without relying on expensive hardware dongles or active server credits. 1. Multi-Chipset Architecture Support

This is almost always a driver issue. Ensure your PC has the correct MTK USB drivers or Samsung drivers installed. Also, always run the utility as Administrator.