hi,
1-is windows essential server 2011,2012 or 2012r2 are nano servers?
2-when you encrypt files on server and backup it with encryption can you retore it when it is needed whitout any problem?
3-when server gets real problems as physical server or as VM server installed on hyper-v is the repair from Cd is the only option besides the restore it from the backup ?
or there is also onother possibilities like reset or fabriek settings as in windows 8.1?