Here’s a draft for a forum-style or blog post investigating the . You can adjust the tone depending on where you’re posting (Reddit, tech support forum, personal blog). Title: BT-100U on Windows 11 – Driver Deep Dive & Fixes
Install libusb or WinUSB driver for the BT-100U via Zadig. This disables Bluetooth but allows flashing new firmware (e.g., to CSR 4.0 dongle firmware that is Win11-native).
; CSR Harmony Generic %CSR.DeviceDesc%=CSR_BT, USB\VID_0A12&PID_0001 Add Windows 11 compatibility line:
%CSR.DeviceDesc%=CSR_BT, USB\VID_0A12&PID_0001&MI_00 Save, reinstall via “Have Disk” in Device Manager.