Symptoms
Consider the following scenario:
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You have at least two accounts on a computer that is running Windows 8.1, Windows RT 8.1, or Windows Server 2012 R2.
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You log on to the computer in a landscape orientation.
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You change the screen orientation to Landscape (flipped) in Screen Resolution.
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You try to switch to another account.
In this scenario, the computer freezes until you perform a cold shutdown to restart the computer.
Cause
This issue occurs because a deadlock occurs when you switch to another account.
Resolution
To resolve this issue, install update rollup 2995388. 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:
2995388 October 2014 update rollup for Windows RT 8.1, Windows 8.1, and Windows Server 2012 R2
Status
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
