Migrating servers from 2008r2 Hyper-v cluster to new 2012 Hyper-v Cluster. All 140 servers have migrated with no issues until my last one.
It is our secondary domain controller. It is running 2008r2 fully patched. I have copied the vhd to the new cluster storage and created the vm profile in 2012 failover cluster manager.
Server boots and I have installed newest integration drivers. The network connection goes to Red X. In device manager I have an exclamation mark on the network adapter. Error 31 can't load drivers.
If I shut it down and boot it back up on our 2008r2 Hyper-v cluster, networking works as expected.
Are there some standalone drivers that I can manually install on the vm or another workaround?
I have tried registry hacks in HKLM\SYSTEM\CurrentControlSet\Control\Network delete theConfig (REG_Binary) key, also tried removing adapter and reinserting, removing adapter and adding legacy adapter. Same results. I am out of ideas and google search reveals no similar issues so far.
Anyone experienced this?