I've installed the 6.3.4 forwarder on a Windows 2008 r2. It's got the Splunk Add-on for Microsoft Windows and perfmon enabled, but no perfmon memory is coming across. I'm thinking it's an OS problem. It is enabled and the forwarder has been restarted several times. It's grabbing Perfmon: PhysicalDisk/CPU/Network, etc, but no Memory.