A: No. Linux (via cdc_acm or ch341 kernel modules) and macOS (via built-in USB-serial drivers) usually work out-of-the-box. This article focuses on Windows.
Check the comments below — our community of engineers and enthusiasts regularly helps decode “XH390 driver upd” problems. This article is for informational purposes. Always back up your system before installing drivers. The author is not affiliated with Prolific, WCH, or Silicon Labs. xh390 driver upd
A: Open Device Manager → Ports (COM & LPT). Or use PowerShell: Get-WmiObject Win32_SerialPort | Select-Object DeviceID, Name xh390 driver upd