Na man veikia iš ISO. Lenovo X1 Carbon. Bandau prisiminti "gal" esu 
daręs upgrade, bet kiek pamenu visad iš USB kraudavau naują.

Kol kas matau, kad abu metodai naudojami priklausomai nuo situacijos. 
Gal yra kitų šaltinių?

https://www.thurrott.com/windows/windows-10/4794/more-windows-10-answers-how-activation-will-work-on-an-upgrade
"And the version of Windows 10 you install must match the version of 
the previous OS. If you had Windows 7 Home Basic, for example, you must 
use Windows 10 Home. If you do, it will work. If you don’t, you will be 
prompted to activate and you will need a Windows 10 Pro product key."

O apie upgrade žinoma jei nėra BIOS'e arba nesutampa licencija, tai 
reikia iš genuine padaryti upgrade ir tada jau galima iš iso.

http://answers.microsoft.com/en-us/insider/forum/insider_wintp-insider_install/the-free-upgrade-to-windows-10-for-windows-7-oem/b622ef33-ac69-4ca1-b7d1-9aa08321809f?page=11
"Your Windows 8.1 has to be activated and then upgraded by running 
setup.exe from the mounted ISO to result in an activated upgrade to 
Windows 10.  The ISO will not search for your previous Product Key and 
activate based on that.  It activates based on detecting an activated, 
authentic, qualifying OS during the upgrade, not by Product Key."



wm submitted this idea :
> Šis variantas man neveikė. Aktyvacijos metu parašė, kad Key yra
> užblokuotas. MS supporte parašyta, kad reikia atgal instaliuoti
> win 7/8, tada updeitintis win 10.
>
> Baltas kompas, Key'us biose.
>
> 2015-07-30 13:29, Caponi rašė:
>> Ta prasme upgreidintis pries tai nereikia, o galima is karto svaru
>> instala daryt?
>>
>> Pats tokios schemos nebandziau, infos apie tokia galimybe kazkaip irgi
>> nemaciau - patikrinta, tikrai aktyvuojasi?