Quick one on how to install .NET Framework 3.5 on Windows Server 2012. Its required for things liks PowerCli on 2012. It cant be installed natively like other roles/features. It needs the install source files. So the quickest way is to mount the 2012 iso to the VM and run the following from an elevated command prompt (assuming d:\ is the mounted iso)
dism /online /enable-feature /featurename:NetFX3 /all /Source:d:\sources\sxs /LimitAccess
LifeOfBrianOC 