This tool is not universal. Using it on a receiver with an incompatible chipset (like Ali or HiSilicon) will not work and could cause errors.
Connect your PC to the receiver using a Null Modem RS232 cable. If your laptop lacks a serial port, you will need a high-quality USB-to-RS232 adapter. Isp Tool V4.20.exe
It utilizes the RS232 (DB9) port or a USB-to-TTL adapter to communicate with the receiver's motherboard. How to Use ISP Tool V4.20 This tool is not universal