I have installed Splunk Enterprise 6.4.1 on a VMware Windows Server 2012 R2 instance. I am able to install the Splunk Universal forwarder specifying the same server as the receiver, but when I attempt to configure the forwarder in Splunk Enterprise, I only receive the option to click on the link to configure the receiver, which I've already done from Splunk Web and from the Universal Forwarder installation.
I'm not using a deployment server and I'm only running one instance. This has been challenging to set up and am very eager to get this running correctly. Thanks!
The Splunk Server can receive data on its own. No forwarder required. (and actually, you shouldn't use it).
If you have Splunk Enterprise on that system, you shouldn't also need the Universal Forwarder on the same system. Splunk Enterprise will do the data collection and index it locally.