How to really set back a trial period of a software?

Written by  on December 7, 2017 

From time to time there are softwares that survive formatting my laptop.
They basically say that the trial period is expired after formatting + a fresh Windows.

They probably use some UUIDs or something.
Does someone know what are the common methods they use and how to circumvent them.
Would a HWID changer be enough?

Any ideas are welcomed

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