Microsoft only issued firmware updates for Surface Pro 3 this month, ignoring its older Surface RT, Surface Pro, Surface 2 and Surface Pro 2 tablets. This might be for the best, however, since it needed to fix a lingering Wi-Fi problem on this newest of Surface devices. And it looks like they may have finally done so.
Surface Pro 3
The following updates in "System Firmware Update – 9/9/2014" applies to Surface Pro 3.
Surface Pro UEFI update (v126.96.36.199) improves system experience and enhances overall system stability, including Wi-Fi.
Surface Pro Embedded Controller Firmware update (v188.8.131.52) enhanced support for system performance and user experience, including thermostat icon on boot.
Surface Pro System Aggregator Firmware update (v3.9.350.0) increases the overall system reliability and compatibility with a Surface cover.
Surface Integration driver update (v2.0.1102.0) enhances user experience, including Wi-Fi stability.
Surface Wi-Fi and Bluetooth driver update (v15.68.3055.107) improves Wi-Fi/ Bluetooth reliability and system stability, and significantly enhances the user experience.
Surface Pro 2, Surface Pro, Surface 2, Surface RT
No firmware updates this month.