Thanks for the welcome!
- We have 6 production 2008 R2 VM's in this cluster - none of the other 5 display this symptom
- No backups running when this issue occurs
- No errors of any significance in the Windows logs when the hang occurs (a couple of SNMP trap errors happened once but...)
- VMWare Tools is installed and running - version 8.6.5
- Widows power settings are on the default 'Balanced'. The only setting there that seemed to deal with 'sleep' or 'shutdown' is the monitor turning off after 10 minutes. I can change that if necessary.
Thanks again for any assistance!