Windows assigns new COM numbers when plugged into different USB ports. Fix: Use the FTDI COM Port Reassignment tool (part of their utilities) or force a specific COM number in Device Manager.
April 14, 2026 | Reading time: 7 minutes ftdibus sys
Microsoft occasionally updates USB core stack behavior. Always use the latest FTDI driver from their official site (version 2.12.00 as of 2025) to avoid blue screens after Patch Tuesday. Windows assigns new COM numbers when plugged into
Windows assigns new COM numbers when plugged into different USB ports. Fix: Use the FTDI COM Port Reassignment tool (part of their utilities) or force a specific COM number in Device Manager.
April 14, 2026 | Reading time: 7 minutes
Microsoft occasionally updates USB core stack behavior. Always use the latest FTDI driver from their official site (version 2.12.00 as of 2025) to avoid blue screens after Patch Tuesday.