The app will be downloaded. There is an evaluation period. The goal is to prevent the user from uninstalling and requesting (or getting away with) downloading a "fresh" evaluation and aquiring another evaluation license.

I have an inocuous (how is that spelled?:) enough, yet important sounding name for the file. I may even assign "important sounding" properties to it.

The file will be created at first run. The systems will be home-office XPs.

My question is what folder can I depend on (or should be used) to test the desktop for an attempt to reinstall over an expired evaluation license?

Is there a better way? System configuration was one thought.

Thanks