After installation, reboot to finalize the COM port assignment.

If you have disassembled an external drive, the SATA-to-USB bridge might have this labeling. 💡 Pro Tip: Avoid "Driver Update" Software

Driver conflict or outdated chipset driver. This is extremely common with Prolific clones. Fix: Uninstall all existing COM port drivers from Device Manager, then use the Prolific Driver Fixer tool (official from Prolific) to clean old entries before reinstalling.

Understanding the AWM 20251 Driver: A Comprehensive Guide