I couldn’t find a direct, safe download link for from an official source.
For most users who just need a mouse and keyboard on a modern PC, stick with Microsoft’s built-in stack. For A2DP stereo audio on Windows 7, CSR Harmony 2.1.63.0 remains a gold standard. Csr Harmony Wireless Software Stack 2.1.63.0 Download 15
Here is the brutal truth:
(Invoking related search term suggestions.) I couldn’t find a direct, safe download link
(Apt-X) USB dongles. It replaces or enhances the standard Windows Bluetooth stack to support advanced profiles like high-quality audio (A2DP) I couldn’t find a direct