You may have installed the wrong edition (e.g., Pro N – Europe version without media features). Verify: Settings > System > About – should say “Windows 10 Pro” not “Pro N”. If wrong, you must reinstall using correct ISO.

For a complete setup of Windows 10 Pro in Portuguese (Brazil) for 64-bit systems, the "better" approach is to use the official multi-edition ISO. This version is superior to unofficial modified versions as it ensures security, stability, and full compatibility with Microsoft updates. 1. Key Advantages of Windows 10 Pro

Why hunt for language packs later when you can have the perfect experience out of the box? The aspect of the ISO ensures that: