CODEWITHSUNDEEP
windowsregistrationuninstallationdemodvd
MinecraftShamrock
MinecraftShamrock

Reputation: 3574

How do demo-versions know the test-time is over after re-installing?

How do applications like CloneDVD2 or AnyDVD know that the free phase is over, even if the application was uninstalled and then re-installed? Those applications don't require the user to login so that they could identify the user again.

Also on deinstalling them a window pops up asking whether the "registration files" should be kept or not. Even if they are not kept, the re-installed application knows the demo-time is over.

How is that technically realized?

Upvotes: 1

Views: 123

Answers (1)

BarryOSeven
BarryOSeven

Reputation: 21

Could be everything...

You might reverse the algorithm to find out.

But to name an example:

It's possible to generate a hash, based on unique hardware identifiers, of your hardware configuration and send that over the internet to a database.

If your hash exists over there, the software knows you ran it before.

An other option is leaving tracking information inside of your OS. So the checkbox: delete register information, isn't deleting everything.

To test:

1) Switch GPU or CPU :P

2) Format & Reinstall computer

Upvotes: 1

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