CU Update to Sql Server 2014 hangs for 7 hours
Changing the reg key HKLM\System\CurrentControlSet\Services\LanmanServer\Parameters\AutoShareServer to 1. restart the server service. Validate by navigating to \servername\C$. If you can't navigate there, the Admin$ share is not available.  In my case something is causing the key to get reverted very quickly.  I'll get with the network admin to suspend this action so the Admin$ share stays available.