Is there a free event/log generator for Windows avalable that i can use to emulate firewalls, database e.t.c.
I am trying to get in sample data into splunk
I would very much appreciate some assistance
If you just want to setup a Splunk demo, maybe sampledata.zip from Splunk tutorial could do? It's not Windows nor firewall or db logs, but on a plus side you get ready-made use-cases for you demo from tutorial with minimal effort. Link to sampledata.zip is at http://docs.splunk.com/Documentation/Splunk/latest/Tutorial/GetthesampledataintoSplunk
If you really want to generate logs (ie simulate) for network devices then you should take a look at http://www.gns3.net/
just saw your post. Maybe the built-in command "eventcreate" under Windows is what you are looking for? It ships with newer Windows versions and generates eventlog entries from commandline. So if you build a loop around it it may be able to fill your eventlog with errors. here is an example:
eventcreate /T ERROR /ID 4711 /L APPLICATION /D "This is a demo error!"
eventcreate /T WARNING /ID 4712 /L SYSTEM /D "just a warning in the system log"