Hello - we have many Win 2008 R2 servers that we've installed and are operating on VMware 5.5 ESXi hosts without issue. We've installed a Windows 2012 R2 server for the first time on a 5.5U2 VM and while it seemed to be working ok for a couple of hours, now has shut itself down and will not boot. The VM guest just keeps restarting on the splash screen and Windows no longer boots up. The VMtools are installed but also do not start. Is this a compatibnilty issue? Driver issue? Any help is appreciated.