Microsoft is taking the unusual step and releasing a late night (for those in the US) cumulative OS update for Windows 10 for the PC.

Cumulative update KB3194496 is now live for those on the Insider Release Preview ring (and likely Slow as well). Microsoft posted the changelog for the update and we're reposting it below.

The changelog applies to both Windows 10 build 14393.222 for PC and Windows 10 Mobile build 14393.221 released earlier this week.

Build 14393.222 (PC) / 14393.221 (Mobile)

  • Improved reliability of the Windows Update Agent, shared drives, virtual private network (VPN), clustering, HTTP downloads, Internet Explorer 11, Hyper-V platform, multimedia playback, and Microsoft Edge.
  • Improved performance of push and local notifications, Hyper-V platform, and some social media websites using Microsoft Edge.
  • Addressed issue where mapping a drive from an elevated command prompt doesn't work with administrator credentials.
  • Addressed issue causing movies that were ripped using the transport stream (.ts) format to play without sound in Windows Media Player and the Xbox One Media Player app.
  • Addressed issue causing the Movies & TV app on the Xbox to stop working when attempting to play content that was just purchased from the Store.
  • Improved support for networks by adding new entries to the Access Point Name (APN) database.
  • Addressed issue causing "Print all linked documents" to not work in Internet Explorer 11.
  • Addressed issue preventing some users from changing the default download location in Windows 10 Mobile.
  • Addressed issue causing unnecessary notifications about fixing Microsoft account in Windows 10 Mobile.
  • Addressed additional issues with multimedia, Windows kernel, Windows shell, enterprise security, storage file system, Remote Desktop, core platform, Hyper-V platform, Windows Update for Business, display kernel, near field communication (NFC), input and composition, Bluetooth, Microsoft Lync 2010 compatibility, Windows Storage API, app registration, Trusted Platform Module, Group Policy, Internet Explorer 11, virtual private network (VPN), BitLocker, wireless networking, datacenter networking, Cortana, PowerShell, Active Directory, connection manager and data usage, Microsoft Edge, Windows Recovery Environment, file clustering, Universal Windows Platform (UWP) apps, audio playback settings, DShow Bridge, app compatibility, licensing, cloud infrastructure, domain name system (DNS) server, network controller, USB barcode reader, and Adobe Flash Player.

Also, Microsoft notes that the builds for PC and Mobile are the same except for "an additional fix to improve the reliability of downloading games (like Forza Horizon 3) and game updates from the Windows Store" is included for PC.

The late night update follows a cumulative update for Mobile on Monday evening that brought the Insider Release Preview and Slow Ring to build 14393.221.