Ch340 Driver Windows 11 May 2026

A: Check Tools → Port → correct COM. Also try pressing reset button on board right before upload starts.

A: No official ARM64 driver exists. Use a USB-to-serial adapter with FTDI or SiLabs chip instead. ch340 driver windows 11

Screenshot of Device Manager showing "USB-SERIAL CH340 (COM4)" ✅ 4. Troubleshooting FAQ (for support page) Q: Does Windows 11 automatically install CH340 drivers? A: Sometimes, but often incorrectly. Manual installation is more reliable. A: Check Tools → Port → correct COM

A: Microsoft tightened driver signing for Windows 11. You must temporarily disable enforcement or use the latest signed driver from WCH (v3.8+ is signed). ch340 driver windows 11