Hi danman06,
if you're receiving _internal logs you've correctly configured outputs.conf.
To take Windows, I suggest to use the Splunk_TA_Windows so that you can download from Splunkbase ( https://splunkbase.splunk.com/app/742/ ).
You have to:
copy this TA on your Universal Forwarder in $SPLUNK_HOME\splunkuniversalforwarder\etc\apps;
then copy the default\inputs.conf file in local\inputs.conf;
modify the local\inputs.conf file enabling WinEventLog:Security stanza changing disabled=1 in disabled=0;
restart Splunk on Forwarder.
At http://docs.splunk.com/Documentation/WindowsAddOn/latest/User/AbouttheSplunkAdd-onforWindows , you can find the documentation to install and configure Splunk_TA_Windows.
In this way you're sure to correctly configure your Windows inputs and you're ready for the next step: deploy this TA in other Forwarder using the Deployment Server, but this is another thing.
Bye.
Giuseppe
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