Is this physical hardware or virtualized ?
If the latter check if the hard-disks are setup as fixed disk or "removable drives".
(VMWare ESX has the nasty habit of creating 2012 machines with removables.)
If the disks are removable LAN access through IPC$ and C$, D$ etc. will fail and you will need that for clustering.
For VMWare this is detailed in KB503423. The workaround is to disable hotplugging on the virtual machine by adding an extra option to the VMX config file as described below.
Connect to the ESXi/ESX host or vCenter Server using the vSphere Client.
Power off the virtual machine.
Right-click the virtual machine and click Edit Settings.
Click the Options tab.
Click General > Configuration Parameters > Add Row.
Insert a new row with the name devices.hotplug and a value of false.
Power on the virtual machine.
Or you can set the option by adding "devices.hotplug=false" directly into the vmx file.