I'm studiyng how the activators normally works in the Windows systems.
I know that some programs are more difficult to activate than others.
A lot of programs (Windows product Key, Microsoft Office, Adobe Photoshop, Sony Vegas and others) have a licence to use. But everytime a new type of activator is released for them.
Sometimes you just need to install a patch, or replace the original file with a changed one you downloaded from the internet.
My question is: how the activators works? They are a few commands or a kind of vírus? Why new activators need to release when a program or system have a new update? Can I create my own?