Some users apply "Windows 7 ESU bypass" patches. These can break CH340 driver signing. Stick to standard Windows 7 SP1.
You should see listed without any yellow warning icons. Troubleshooting for Windows 7 Usb-serial Ch340 Driver Windows 7 32bit Download
Yellow exclamation in Device Manager. Error: "This device cannot start. (Code 10)" Causes: Corrupt driver cache, IRQ conflict, or incomplete installation. Solutions: Some users apply "Windows 7 ESU bypass" patches
Sometimes the executable installer fails silently. Use the manual driver installation method. Usb-serial Ch340 Driver Windows 7 32bit Download
