I installed the update, already running 8.1 here but Windows Update offered it anyway.
After the several reboots for firmware, it had rolled back the display driver so I reinstalled it and rebooted. It seemed to have left the WiFi and Wacom drivers alone.
I would have preferred to download the zip like I did for the August update, so I could choose the individual pieces, but it's not yet in the download center. Would also be nice if the release notes page was a bit more detailed.
For me, the firmware update left both of those (newer) drivers untouched. As best I can tell, it did update the Intel Management Interface driver, but left some of the other system devices on their old 2006 generic MS driver versions. Everything works smoothly for me so far.
I also did the october Firmware update on Windows 8.1 RTM Enterprise.
- The intel graphics driver was downgraded to version 10.18.10.3262 ( I had 3282). So no Intel Graphics Control Center anymore. Have to update them myself.
- A surprise was the new Bluetooth driver from Marvell, I had the march 2013 version, now I have the 2-8-2013 version. Hope that it will solve the Sculpt Comfort Mouse problems I have. (hicupps)
- New cam drivers
I did the new update also. It rolled my graphics driver back. So I reinstalled the latest Intel generic one from 7/29/2013. Version 220.127.116.1157. Like I have linked in my thread on latest graphics driver update.