The cumulative update, KB2779768 (released through Windows Update), fixes stability issues when you use Windows Server Network Load Balancing in virtual machines, that connect to the network using a Windows Server 2012 NIC Team. This issue range from disconnections to sad faces of death (aka blue screen of death [BSOD]).
The observant of you will notice there is no documentation on the referenced page, and the referenced KB articles do not exist, at least publicly. However, it has been confirmed that this update does include the fix for the above issue.
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