Is the page file off?
System -> Advanced system settings -> Advanced -> Performance settings -> Advanced
Standard and Datacenter are supposed to be the same, the only difference is in licensing.
Windows Server 2012 Datacenter and Standard are technically identical – there is absolutely no difference between them with regard technical capabilities.
The only difference is the virtualisation rights included with the license (two VMs for Standard and as many as you like for Datacenter). So if you’re virtualising you should be using Datacentre – that’s the only decision you have to make. As a rule of thumb, once you get to around five VMs you should have gone with Datacentre.
Thanks for the reply Carl. I assumed as much regarding the OS - it would be more of a licensing issue as you said.
This problem was solved by Andrew, the tech who set up the server. He ran the setup page via SSL and after a warning in Chrome (IE will not allow it) the setup went through perfectly. Andrew substituted the URL: