For most generic CSR 4.0 dongles, the latest drivers are part of the stack. While many vendors ship these adapters with a mini-CD, downloading the latest version online is recommended for better compatibility. Recommended Download Sources
CSR 4.0 is fully compatible with USB 3.0, but USB 3.0 ports emit electromagnetic interference that can disrupt Bluetooth signals. Use a USB 2.0 port or a 1-meter USB extension cable. csr 4.0 bluetooth driver download latest version
Go to and uninstall anything named "CSR Harmony" or "Bluetooth Suite". Restart your computer. 2. Install the New Driver For most generic CSR 4