Audio outputs not recognizing devices when ask to pair. Bluetooth OK tho and minijack for headphones OK but not external speakers via USB inputs on back of desktop.

It sounds like you're experiencing issues with USB audio devices not being recognized by your desktop. Here are a few troubleshooting steps you can try:

1. Check Device Manager: Open Device Manager and ensure that your USB audio devices are listed and do not have any warning symbols. If they are listed but not working, you may need to uninstall and reinstall the drivers.
2. Try Different USB Ports: Sometimes, the issue might be with a specific USB port. Try connecting your USB audio device to a different USB port on the back of your desktop.
3. Install Device-Specific Drivers: If you haven't already, try installing the device-specific drivers for your USB audio device before connecting it. This can help ensure that Windows recognizes the device correctly.
4. Check Audio Services: Make sure that the Windows Audio and Windows Audio Endpoint Builder services are running. You can check this by typing services.msc in the Run dialog (Win + R) and looking for these services.
5. Update Windows: Ensure that your Windows operating system is fully updated, as updates can include important fixes for hardware compatibility issues.

If these steps do not resolve the issue, you might want to refer to specific articles on USB audio devices not playing or malfunctioning for more detailed guidance.

References:

• USB audio device not playing
• USB-connected audio or video devices malfunction when connected to specific Intel-based devices