This was an annoying little issue I came up against when trying to install .NET Framework 3.5 on a Windows Server 2012 R2 virtual machine.
The normal procedure is to use Server Manager | Add Roles & Features and select .NET Framework 3.5 features from the list, see below
2016 was the second full year for TechSupportPro | UK, and a very productive one it was. With a trip to Leeds, UK, I attended a Microsoft tech day, and got my first look at Windows Server 2016. I tested my first wearable device, a Microsoft Band 2 and I also got a first look at Windows 10 Mobile. 2016 was one to remember.