Function keys don't work if IME is enabled in Windows 8.1 or Windows Server 2012 R2
On a computer that's running Windows RT 8.1, Windows 8.1, or Windows Server 2012 R2, you enable the Microsoft Japanese input method editor (IME). Then, you press a function key (F1~F12) to perform a specific function in a Windows Store app. However, you discover that the function key does not work.
This issue occurs because function keys are not delivered to Windows Store apps when an IME is enabled.
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:
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.
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: 2930280 - Last Review: 04/08/2014 16:53:00 - Revision: 1.0
Windows 8.1 Enterprise, Windows 8.1, Windows 8.1 Pro, 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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