. Your plotter should appear as something like "USB-SERIAL CH340 (COM3)". Port Number Rule: If your assigned COM port is 10 or higher

Once the driver is installed, you must ensure Windows and your software are "talking" to the right port: Find the Port: Device Manager and look under Ports (COM & LPT)

To overcome these challenges, it is essential to locate and install the correct Rohs Cutting Plotter 721 drivers for Windows 10. Here are some steps to follow:

: To install older drivers on Windows 10, users often must disable driver signature enforcement via the "Startup Settings" menu (F7) during the boot process to bypass "unverified publisher" warnings.

Provides a generic Vinyl Cutter USB Port Driver guide and download that works for most Chinese-manufactured plotters. 3. Step-by-Step Installation Guide for Windows 10

Run the installer before plugging in the plotter.