Windows 8.1 KB4015547 and KB4015550 fix a long list of security issues

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This month’s Patch Tuesday edition has brought two important updates to Windows 8.1.  Security update KB4015547 and Monthly Rollup KB4015550 bring a series of bug fixes and improvements that will make the OS more stable and reliable.

In order to apply these two updates, you first need to have Windows 8.1 KB2919355 installed on your computer. You can download Monthly Rollup KB4015550 through Windows Update or from Microsoft’s Update Catalog. Update KB4015547 can be downloaded as a stand-alone package from Microsoft’s Update Catalog website.

Without further ado, let us see what these two updates bring to the table.

Windows 8.1. KB4015547

  • Fixed security vulnerabilities in Hyper-V, libjpeg image-process library, Win32K, Adobe Type Manager font driver, Active Directory Federation Services, Lightweight Directory Access Protocol, Windows kernel-mode drivers, OLE, Scripting Engine, Windows Graphics component and Internet Explorer.
  • Addressed an issue that was causing Authentication Success and Failure events with Event ID 4768 to not be logged after installing KB4012213.
  • Addressed a bug check encountered on Windows Server 2012 R2 Hyper-V hosts with error code 0xE4 after installing KB4012213.
  • Enabled detection of processor generation and hardware support when PC tries to scan or download updates through Windows Update.

Windows 8.1 KB4015550

  • Improvements and fixes that were a part of update KB4012219 (released March 21, 2017)
  • Fixed security vulnerabilities in Hyper-V, libjpeg image-process library, Win32K, Adobe Type Manager font driver, Active Directory Federation Services, Lightweight Directory Access Protocol, Windows kernel-mode drivers, OLE, Scripting Engine, Windows Graphics component and Internet Explorer in addition to these quality improvements:
  • Addressed an issue that was causing Authentication Success and Failure events with Event ID 4768 to not be logged after installing KB4012216.
  • Addressed a bug check encountered on Windows Server 2012 R2 Hyper-V hosts with error code 0xE4 after installing KB4012216.
  • Addressed issue where a server may fail with STOP 0x3B error leading to data loss when Input Method Editors (IME) like keyboards are installed.

Both KB4015550 and KB4015547 are stable updates — users haven’t reported any issues after installing them.

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