Fixing Bluetooth problem with TP-Link UB400

I recently bought myself some Sony Bluetooth earbuds for my phone, but I was keen to see if I could connect them to my PC too – so that I could use them in conference calls, for example.

But my computer didn’t have Bluetooth. So I bought TP-Link UB400 Bluetooth Adaptor online, because I’ve used and liked their stuff before. But when I plugged it in it didn’t work! Windows 10 kept telling me I didn’t have Bluetooth installed.

I went to the TP-Link FAQ for the UB400 – but nothing they suggested worked.

After a bit of Googling, I went to the Windows Device Manager, looked at the Universal Serial Bus controllers, and disappeared down a rabbit hole trying to fix the “Unknown USB Device (Device Descriptor Request Failed)” problem.

And only then did I go to the “CSR Bluecore Bluetooth” driver that also appeared on the list of Universal Serial Bus controllers when I plugged in the dongle. As an experiment:

  1. I right-clicked “CSR Bluecore Bluetooth and selected “Update driver”
  2. Clicked on “Browse my computer for driver software”
  3. Clicked on “Let me pick from a list of available drivers on my computer”
  4. Picked “Generic Bluetooth Adaptor” in place of “CSR Bluecore Bluetooth”
  5. Clicked “next”

and suddenly everything worked!

So that’s my solution! I hope it works for you too.

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One Response to Fixing Bluetooth problem with TP-Link UB400

  1. Armand says:

    Thank you! I’ve had my UB400 dongle “disappear” after I moved it to another USB port, and in Device Manager it would come out as “hidden”, with all the device icons greyed out. What I could find on the TP-Link site was either useless or too annoying (e.g., installing the their CSR driver, which wasn’t made for Win 10, and was very annoying to use).

    Long story short, your solution worked immediately, and restored my settings, and access to the paired devices.

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