Purchase directly from Microsoft Store (online), Amazon Brasil, Kabum, or Pichau. Avoid "R$20 keys" from Mercado Livre – these are usually volume license abuse or stolen credit card purchases.
If you need the PT-BR 64-bit ISO for a clean installation (not portable), follow these official steps. You do not need a product key to download the ISO, only to activate it later. windows 10 pro ptbr x64 iso download portable
Click Start. Rufus will format the drive and install the OS files onto the USB. System Requirements Purchase directly from Microsoft Store (online)
For users looking to download a Windows 10 Pro PT-BR x64 ISO windows 10 pro ptbr x64 iso download portable
Only pursue the path if you have a high-end external SSD and a specific need to run a persistent Windows session portably.