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User logon takes a long time in Windows 8.1 or Windows Server 2012 R2

Assume that you have a computer (such as a Microsoft Surface) that is running Windows RT 8.1, Windows 8.1, or Windows Server 2012 R2. In this situation, you encounter the following issues:
  • The computer takes a long time during the user logon interface.
  • The svchost.exe process "pegs out" one of the CPU cores and never stops, so the CPU usage is very high.
  • The computer is in a non-idle or an un-responsive state.

This issue occurs because the usage of the CPU is high when several enumeration queries and applicability checks are made by the AppxDeploymentServer.dll file during user logon.

Update information

To resolve this issue, install update 2919355. For more information about how to obtain this update rollup package, click the following article number to view the article in the Microsoft Knowledge Base:

2919355 Windows RT 8.1, Windows 8.1, and Windows Server 2012 R2 Update April, 2014

Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.
More information
For more information about software update terminology, click the following article number to view the article in the Microsoft Knowledge Base:
824684 Description of the standard terminology that is used to describe Microsoft software updates

Article ID: 2941449 - Last Review: 06/12/2014 06:17:00 - Revision: 3.0

Windows 8.1 Enterprise, Windows 8.1 Pro, Windows 8.1, Windows RT 8.1, Windows Server 2012 R2 Datacenter, Windows Server 2012 R2 Essentials, Windows Server 2012 R2 Foundation, Windows Server 2012 R2 Standard

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