Windows 10 'Patch Tuesday' build 16299.125 now rolling out

Microsoft is rolling out new Patch Tuesday updates for September on PC and Mobile today. This months patches bring Windows 10 up to build 16299.125 on PC. This weeks patches include a number of new fixes and under the hood enhancements. The update on PC is rolling out as KB4054517, with the Mobile update referring to itself as "2017-12 update for Windows 10."


  • Updates Internet Explorer's default visibility for the button that launches Microsoft Edge.
  • Addresses issue where Windows Defender Device Guard and Application Control block some applications from running, even in Audit-Only Enforcement Mode.
  • Addresses issue to reset PLC bit on U0/U3 transitions.
  • Addresses issue with personalized Bluetooth devices that don't support bonding.
  • Addresses issue where the touch keyboard doesn't support the standard layout for 88 languages.
  • Addresses issue where the touch keyboard for a third-party Input Method Editor (IME) has no IME ON/OFF key.
  • Addresses additional issues with updated time zone information.
  • Addresses issue where, when using System Center Virtual Machine Manager (VMM), the user can't copy or clone virtual machines (VM). The error message is "0x80070057- Invalid parameter". This issue affects the VMM UI and PowerShell scripts used for VM cloning and copying.
  • Security updates to the Microsoft Scripting Engine, Microsoft Edge, and Windows Server.

The updates are rolling out now for users in the Release Preview ring and Production ring. Make sure you check for updates to get them downloaded, or wait for Windows Update to automatically download them soon.

Zac Bowden
Senior Editor

Zac Bowden is a Senior Editor at Windows Central. Bringing you exclusive coverage into the world of Windows on PCs, tablets, phones, and more. Also an avid collector of rare Microsoft prototype devices! Keep in touch on Twitter and Threads