Download the newest WHQL-certified CH340 driver. Alternatively, you can temporarily disable driver signature enforcement via the Windows 10 Advanced Startup menu to install legacy drivers, though this should be a last resort. Issue 3: The machine stops cutting mid-design
Expand the "Ports (COM & LPT)" section. You should see "USB-SERIAL CH340 (COMx)" or similar. Jk 721 Cutting Plotter Driver Windows 10
Right-click the Windows Start Menu button and select . Scroll down and expand the Ports (COM & LPT) section. Download the newest WHQL-certified CH340 driver