Thanks for the tip, hopefully it will help the next person who has the issue.
Have a similar problem, "Updating your System (8%)" stuck forever.
I will let you know what I find as I research further. I have just encountered the same symptoms but with a brand new Dell R720.
So far I have: Let it run overnight to see if it completed: no change rebooted many times: no change booted into safe mode and safe mode with networking: no change went into safe mode command prompt and renamed the Software Distribution folder: no change removed all network cards from Hyper-V VM and rebooted: no change I am out of ideas. The only workaround I know works (and is more painful than beneficial) is to install the guest, disable all integration services on the host, use legacy v NICs, etc, and use DISM to yank out the integration components and drivers from the guest, all before patching. XML file that is hosting the updates sequence and reboot. If for a lab a Dell C1100 1U (not the clones) can be had for a song on e Bay.
I can always rebuild it again and avoid installing all of the updates at once but I would rather know how to fix this in case it comes up on one of our other production servers. Once an incompatible patch has been applied....restore a backup or reinstall. Just the downside of running an OS on unsupported hardware. Can Concerto Cloud Services help you focus on evolving your application offerings, while delivering the best cloud experience to your customers? Intel Xeon Processor E5600 series (don't purchase "L" codes), RAM, and 1U server. BIOS will have relatively recent virtualization acceleration features needed and the NICs may be relatively virtualization friendly too. The server is a brand new ISO downloaded from Microsoft VLSC last week and nothing mentioned U1 refresh.
(Another nearly identical virtual server on this host that has not been updated is working perfectly.) After running all available windows updates, the virtual server gets stuck at the Hyper-V screen and says "updating your system (6%)" and never proceeds. ) a known compatibility issue with some main board drivers and the 2012 R2 integration services, and the server was old enough that Dell was not going to release updated drivers adding support.
I had this happen on an earlier server I built so I scrapped it and started over and the exact same issue occurred again. As I recall, the 2950 is still not certified for 2012 R2. So while you can get a basic install working, any patch that touches the integration services will cause issues. Files on ISO should be dated late November 2014 or early December 2014. I highly doubt that it's worth spending too much time with it.