This article describes a microcode update for Intel processors. This update improves the reliability of x64-based versions of Windows that uses certain Intel processors. This update fixes an issue in which the operating system might function incorrectly. These issues are not common.

Issues that the cumulative update fixes. This cumulative update fixes the following issues: A denial of service vulnerability in Microsoft Skype for Business Server. A spoofing vulnerability in Microsoft Skype for Business Server.

The MANIFEST files (.manifest) and the MUM files (.mum) that are installed for each environment are listed in the "Additional file information" section. MUM, MANIFEST, and the associated security catalog (.cat) files, are very important to maintain the state of the updated components.

The easiest way to get language packs for Windows 8.1 and Windows RT is to download and install them using the Language Control Panel. Download and install additional languages to view menus, dialog boxes, and other user interface items in your preferred language.

How to install the update. To install this cumulative update for Skype for Business Server 2015 (Web Components Server), follow the steps that are described in Updates for Skype for Business Server 2015 (KB3061064).

Application compatibility updates trigger several changes in Windows XP Professional x64 edition, in Windows Server 2003, in Windows Vista, in Windows Server 2008, in Windows 7, in Windows Embedded Standard 7, or in Windows Server 2008 R2. The following are the three most common changes:

The file name contains the culture name "zh-Hant". In this scenario, the Web application cannot run. Additionally, you receive an exception error that resembles the following: Description: An error occurred during the compilation of a resource required to service this request.

To apply this cumulative update, you must follow the steps that are described in Updates for Skype for Business Server 2015 (KB3061064) on computers that are running the following server roles:

If some Windows functions aren't working or Windows crashes, use the System File Checker to scan Windows and restore your files. Though the steps below might look complicated at first glance, just follow them in order, step-by-step, and we’ll try to get you back on track.

Summary. This security update resolves vulnerabilities in Microsoft Office that could allow remote code execution if a user opens a specially crafted Office file. To learn more about these vulnerabilities, see Microsoft Common Vulnerabilities and Exposures CVE-2017-8509.