February 9, 2016 — KB3135173 (OS Build 10586.104)

This update includes quality improvements and security fixes. No new operating system features are being introduced this month. Key changes in this update include:

• Fixed issues with authentication, update installation, and operating system installation.

• Fixed issue with Microsoft Edge browser caching visited URLs while using InPrivate browsing.

• Fixed issue that didn't allow simultaneous install of apps from Microsoft Store and updates from Windows Update.

• Fixed issue that delayed the availability of songs added to the Groove Music app in Windows 10 Mobile.

• Improved security in the Windows kernel.

• Fixed security issues that could allow remote code execution when malware is run on a target system.

• Fixed security issues in Microsoft Edge  and Internet Explorer  11 that could allow code from a malicious website to be installed and run on a device.

• Fixed additional issues with the Windows UX, Windows 10 Mobile, Internet Explorer  11, Microsoft Edge, and taskbar.

• Fixed additional security issues with .NET Framework, Windows Journal, Active Directory Federation Services, NPS Radius Server, kernel-mode drivers, and WebDAV.

For more info about the security fixes in this update and a complete list of affected files, seeKB3135173.