Run the downloaded installer ( CH341SER.EXE or the FTDI executable) as an Administrator.
The traditional, 9-pin connection. This is the most stable connection method but requires an older PC or a dedicated PCI-e serial card. USB Port: The standard modern connection. The Hidden USB-to-Serial Chip
Older legacy drivers may lack updated Microsoft digital signatures. You may need to temporarily restart your PC in Disable Driver Signature Enforcement mode via Windows Advanced Startup options to complete the installation. 4. The Cut Stops Halfway Through
Which are you using (e.g., SignMaster, Artcut, Flexi)? What Windows version is your PC running?
Installing the driver is only half the job. You must now tell your cutting software (e.g., SignMaster, Flexi, VinylMaster) which driver to use.
After installation, Windows must assign a specific virtual COM port number to your machine. Your cutting software will need this exact number. Keep the plotter plugged in and turned on. Open again. Expand the Ports (COM & LPT) section.