Server 2012 VMs hosted on 2012 R2 Hyper-V fail to update, all other OS VMs are fine

Host: 2012 R2
VMs: 2008 R2, 2012, 2012 R2
Systems has been running fine until I decided to update my VMs a few days ago with the Dec 10th updates. 2008 R2 VMs update no problem, 2012 R2 VMs update no problem, but 2012 VMs fail to update. I spent 7 hours on the phone with MSFT and they
can not figure it out. They are going to continue working with me, but wanted to post this to see if anyone else was having issues updating their 2012 VMs on 2012 R2 Hyper-V.
The 2012 VMs used to updated just fine until this round of updates.
To trouble shoot, I discounted all my storage and put a spare HDD into the host and setup up Hyper-V all over again and setup a few test VMs. Even tested VMs on various storage options and direct connected drives. Same deal... 2008 R2 and 2012
R2 update, but 2012 will not update. I even setup 2012 on ESXI and VMWARE Fusion and they both update straight away.
I'm 3 days into this... head is about to pop :(

Hi ,
It should happen within Gen2 VM , please refer to following link:
http://technet.microsoft.com/en-us/security/advisory/2871690
Best Regards
Elton Ji
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"If i set the hyper-v server up as a standalone in a work group. Would i be able to manage ther VM's within the hyperv server from my external windows 8 pro machine using the remote server management tools or would i need to
connect that pc to the domain."
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. : | : . : | : . tim

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Sam Boutros, Senior Consultant, Software Logic, KOP, PA http://superwidgets.wordpress.com (Please take a moment to Vote as Helpful and/or Mark as Answer, where applicable) _________________________________________________________________________________
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Microsoft Failover Clusters require shared storage. If you wish to create a failover cluster with local storage, you need to use third party software to mirror the disks and present it to the hosts (siog.com, datacore.com, starwind.com). If you
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.:|:.:|:. tim

Server 2012 VMs hosted on 2012 R2 Hyper-V fail to update, all other OS VMs are fine

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