To use the SU2Serial Port Driver with Miracle Box, you are likely dealing with Spreadtrum (SPD) or MediaTek (MTK) chipset devices that need a virtual COM port for flashing or unlocking.
Connect your phone in Boot Mode (often by holding Volume Up/Down while plugging in the USB). su2serial port driver miracle box
For a practical look at how this 'miracle' driver is installed to fix port errors, check out this guide: To use the SU2Serial Port Driver with Miracle
Shift and click "Restart."Troubleshoot > Advanced Options > Startup Settings.F7 to disable driver signature enforcement.