Installing and searching for updates is slow and high CPU usage occurs in Windows 8.1 and Windows Server 2012 R2

This article describes an update that contains some improvements for the Windows Update client in Windows 8.1, Windows RT 8.1, and Windows Server 2012 R2. This update has a prerequisite.
Issues that are fixed in this update

Issue 1

When you install Windows updates by using System Center Configuration Manager, the installation takes a long time to complete, and System Center Configuration Manager becomes overloaded.

Issue 2

The Svchost.exe process takes 100 percent of the CPU usage when you try to upgrade to Windows 10. 
How to get this update
Important If you install a language pack after you install this update, you must reinstall this update. Therefore, we recommend that you install any language packs that you need before you install this update. For more information, see Add language packs to Windows.

Method 1: Windows Update

This update is provided as an Optional update on Windows Update. For more information about how to run Windows Update, see How to get an update through Windows Update.

Method 2: Microsoft Download Center

The following files are available for download from the Microsoft Download Center.

Operating systemUpdate
All supported x86-based versions of Windows 8.1DownloadDownload the package now.
All supported x64-based versions of Windows 8.1 DownloadDownload the package now.
All supported x64-based versions of Windows Server 2012 R2DownloadDownload the package now.
Note The update for Windows RT 8.1 can be got only from Windows Update.

For more information about how to download Microsoft support files, select the following article number to view the article in the Microsoft Knowledge Base:
119591 How to obtain Microsoft support files from online services
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Update detail information

Prerequisites

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