Ensure you download the correct version. ORICO packages usually include both x86 and x64 folders. Run the setup from the correct architecture.
If the Bluetooth on/off switch disappears entirely from Windows 10/11: Driver collision or disabled Windows service. orico bta-403 driver
For most Windows 10/11 users, stick with the Microsoft generic driver unless you have audio problems. For Windows 7 or audio enthusiasts, install the official ORICO BTA-403 driver (CSR Harmony) . Ensure you download the correct version