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This usually indicates a baud rate mismatch or incorrect driver selection (e.g., selecting the wrong "KingCut" vs "Creation" driver).
Windows may overwrite the driver with a generic one. If the cutter stops working, return to Device Manager and roll back or reinstall the FTDI driver. The "How to setup a USB P-Cut" Guide - PCUT Vinyl Cutters creation pcut ct630 driver windows 10
Look under Ports (COM & LPT) for "USB Serial Port (COM#)". This usually indicates a baud rate mismatch or