Windows 10 migration

If I format my pc that I install windows 8, can I migrate to windows 10?

First you can say "Hello"

But anyway

Yes, normally, you can switch freely to W10 from W8
You just have to go on Microsoft website

Bye

Yes sorry.

Ok thank you, I'll try it then.

I'll come back if I have a problem.

Bye

Re !

Ooops, forgot it but now the change cost something like 130$...

Sorry about that

So it's possible but not free anymore :/

Argh...

Do you have an other solution even if it's not legit to have windows 10 ?

Thanks in advance