Download the Silicon Labs CP210x Universal Windows Driver from their official website.
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If your adapter shows up as COM15 or higher, some older software won't detect it. Download the Silicon Labs CP210x Universal Windows Driver
Windows 11 enforces strict driver signing requirements. Drivers with expired or missing certificates are blocked outright. usb to ttl driver windows 11 upd
How to Download, Install, and Troubleshoot USB to TTL Drivers on Windows 11