http://blogs.technet.com/b/askcore/archive/2013/01/14/error-in-failover-cluster-manager-after-install-of-kb2750149.aspxOn Tuesday, Jaunary 8, the below recommended fix was released and available on Windows Update for Windows .NET Framework 4.5. 2750149 An update is available for the .NET Framework 4.5 in Windows 8, Windows RT and Windows Server 2012 http://supporten-USTelligent Evolution Platform Developer Build (Build: 5.6.50428.7875)http://blogs.technet.com/b/askcore/archive/2013/01/14/error-in-failover-cluster-manager-after-install-of-kb2750149.aspx#3547751Wed, 23 Jan 2013 09:29:38 GMTd5e57398-b9ef-4490-9955-07cbb4e4a80d:3547751Stefan<p>Fix has already been released, please update this post :</p> <p><a rel="nofollow" target="_new" href="http://support.microsoft.com/kb/2803748">support.microsoft.com/.../2803748</a></p> <div style="clear:both;"></div><img src="http://blogs.technet.com/aggbug.aspx?PostID=3547751" width="1" height="1">