Article ID: 2938474 - View products that this article applies to.
Consider the following scenario:
To resolve this issue, remove the virtual switches, remove the Hyper-V role from the computer, and install update 2919355. Then, re-enable the Hyper-V role, and recreate the virtual switches. For more information about how to obtain update 2919355, click the following article number to view the article in the Microsoft Knowledge Base:
(https://support.microsoft.com/kb/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:
(https://support.microsoft.com/kb/824684/ )Description of the standard terminology that is used to describe Microsoft software updates
Article ID: 2938474 - Last Review: April 8, 2014 - Revision: 2.0