You can often find verified versions on professional mobile forums like Chipset Specs:
: To get the PC to recognize the SC6531E, you must often hold a specific button (usually the Center/OK button sc6531e usb driver full
: Another application (like Modem Monitor or HyperTerminal) is holding the port. Solution : Close all COM port monitoring tools. In Device Manager, go to Port properties → Advanced → Change COM port number to COM1-COM4 (low numbers work best). You can often find verified versions on professional