This document outlines the technical features and user-facing capabilities required for a modern driver package targeting Windows 10/11, Linux, and macOS.
Cause: Bluetooth service is off, or the E-UB5 is in a USB 3.0 port (causing interference).
Fix:
Win + R, type services.msc, ensure “Bluetooth Support Service” is running and set to Automatic.Most users searching for e-ub5 bluetooth usb dongle driver are on Windows 10/11. Good news: Windows often has a built-in inbox driver for CSR chips. Here’s how to activate it. e-ub5 bluetooth usb dongle driver
Here is the manual method that works 99% of the time:
Step 1: Remove Old Drivers
Step 2: Install the CSR Driver
csr_bt_driver_4.0.0.7100.zip file.csr_hc_install.inf file and select Install. (If you don't see "Install," you need to use the "Have Disk" method in Device Manager).Step 3: Plug in the Dongle
Option 1 – Use Generic CSR 4.0/5.0 Driver (most reliable):
Option 2 – Use a driver from a known working dongle (e.g., ORICO BTA-508): Error 3: Dongle detected, but can’t find any
Option 3 – Windows 11/10 built-in (sometimes works):
| Problem | Solution |
| :--- | :--- |
| "Driver is unavailable" in Settings | Go to Services (services.msc). Find "Bluetooth Support Service." Set it to Automatic and restart it. |
| Device pairs but disconnects | Go to Power Management in Device Manager (Right-click the dongle > Properties). Uncheck "Allow the computer to turn off this device." |
| Code 10: Device cannot start | This is a driver conflict. Uninstall the device, run the CSR Cleaner utility (search online), reboot, and reinstall. |
| Can't find my headphones | The E-UB5 is Bluetooth 4.0. It works with headphones, but not with Apple AirPods Pro 2 (which require BLE Audio). Stick to standard SBC/AAC codecs. |