Article ID: 2924603 - View products that this article applies to.
After you upgrade the system from Windows 8 to Windows 8.1, CPU usage may frequently be high and the system may sometimes freeze during shutdown. Even when the computer is idle, the CPU usage may exceed 40%.
This issue occurs because the Windows Backup Process (SDCLT.exe) keeps starting itself.
To resolve this issue, install update 2919355. For more information about how to obtain update 2919355, click the following article number to view the article in the Microsoft Knowledge Base:
2919355Note The problem described in this article may occur when you restart your computer to apply the hotfix. After restarting, the old files will be replaced, and the problem will not occur afterward.
(http://support.microsoft.com/kb/2919355/ )Windows RT 8.1, Windows 8.1, and Windows Server 2012 R2 Update April, 2014
To work around this issue, follow these steps:
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.
For more information about software update terminology, click the following article number to view the article in the Microsoft Knowledge Base:
(http://support.microsoft.com/kb/824684/ )Description of the standard terminology that is used to describe Microsoft software updates
Article ID: 2924603 - Last Review: April 8, 2014 - Revision: 1.0