You can download Windows 10 and install it without a key by following these steps:
- Go to the Microsoft website and download the Windows 10 Media Creation Tool.
- Run the Media Creation Tool and select “Create installation media for another PC.”
- Choose the language, edition, and architecture (32-bit or 64-bit) of Windows 10 you want to download.
- Choose the “USB flash drive” option to create a bootable USB drive or the “ISO file” option to create a bootable ISO image file.
- Follow the prompts to create the installation media.
- Once the installation media is created, insert the USB drive or mount the ISO file.
- Restart your computer and boot from the USB drive or the mounted ISO file.
- Follow the prompts to install Windows 10. When asked for a product key, click the “I don’t have a product key” option.
- Continue with the installation process. Windows 10 will automatically activate once it is installed and connected to the internet.
Note that while you can use Windows 10 without a product key, you may encounter some limitations such as a watermark on the desktop and the inability to personalize some settings. Additionally, some features may not be available until you activate Windows.