Question How do i know the activate code for the windows?

Aug 26, 2019
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Hi,
I have windows 8.1 and I want to upgrade to windows 10 my 8.1 windows are legally activated so when I start the upgrade processor I choose the option "keep my data" it asks me for the windows activate number so how do I know the windows activate number? and is the "keep my data" option really gonna save my data?
 
How are you invoking this 'update'?
Where did the 8.1 license come from?
From a valid Win 8.1 OS, it should not ask for the existing license key.
How are you invoking this 'update'? from the computer properties
Where did the 8.1 license come from? I have a Dell laptop Inspiron 15 3000 series it came with the laptop
and I don't think the license key is expired