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In general, how are Windows applications registered against a key?

I assume that the application performs some sort of check against the provided key and stores some value in the registry?

How do 30 day free trials work? Does the application also store a registry value that determines whether the products free trial has expired?

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The communicate with a web service. But there are other ways far to many to list. This topic also has nothing to do with Security. – Ramhound Jun 18 '12 at 17:46

closed as off topic by AviD♦ Jun 19 '12 at 9:12

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