Consider the following scenario:
You have a computer that is running Windows RT 8.1, Windows 8.1, or Windows Server 2012 R2.
You have installed update rollup 2883200 on the computer.
You copy or paste network information in Network in PC Settings.
In this scenario, the icons or tiles on the Start screen freeze.
For more information about update rollup 2883200, click the following article number to view the article in the Microsoft Knowledge Base:
2883200 Windows 8.1 and Windows Server 2012 R2 General Availability Update Rollup
This issue occurs because of a regression in update rollup 2883200. This regression causes the unexpected freeze.
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
To work around this issue, log off and then log on to the computer.
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