π β On Windows 10/11, you may need to disable driver signature enforcement temporarily. Yes, even with official Cisco drivers.
π β v3.1 works great for many legacy devices (ISR G2, ASR 1000), but newer gear sometimes prefers v3.0 or even a direct serial cable.
π§Ή β Upgrading from v2.x to v3.1? Remove the old driver first, or youβll get phantom COM ports that donβt respond.