I have a number of permon counters defined as HTML files and would like to know if there is an easy way to simply start these counters from a batch file/command line. I am sure perfmon.exe takes command line parameters but have had no luck with them. Thanks in advance

Why not, setup the counters you want, save it onto your desktop (File >> save As) with whatever name you want. Say you wanted an instance that monitors different aspects of your NIC. Create it, save it as something like "Perf_Nick.msc". Then all you have to do is start it and it's up and running with the counters you selected. If you really need to run it from a batchfile, then create a batchfile that calls the instance of perfmon you created.

Thanks, thats actually what I ended up doing, but the counters won't start until you manually click the 'play' button. I was looking for a completely hands off approach.

Hmmm...I've never tried to automate it like that so I can't say whether or not it can be done. Sorry! Maybe with a bit of luck someone else who has will see this and respond.