You do not need a product key to download the ISO. You only need a key to activate it after installation. You can install and use Windows 10 Pro unactivated indefinitely with minor customization restrictions.

Downloading Windows 10 Pro ISO 64-bit for free from unofficial sources may be considered piracy, which is against Microsoft's terms of service. Additionally, downloading from unofficial sources can pose risks to your device and data.

Before installing, ensure your hardware meets the minimum requirements for the 64-bit version of Windows 10 Pro: Minimum Requirement 1 GHz or faster compatible processor RAM 2 GB for 64-bit Hard Drive Space 20 GB for 64-bit OS Graphics Card DirectX 9 or later with WDDM 1.0 driver Display 800x600 resolution Installation and Activation

Microsoft provides the official ISO download tool, not a direct ISO link (which changes frequently).

Windows 10 Pro is a 64-bit operating system that offers a range of advanced features, including enhanced security, improved performance, and increased productivity. It is designed for businesses, professionals, and power users who require a reliable and efficient operating system.

As of the support lifecycle for Windows 10, Microsoft continues to provide Windows 10 Disc Images (ISO files) officially for free download. These files are 64-bit compatible and serve as a clean installation method or a repair tool. The "Pro" edition is typically bundled within the multi-edition ISO provided by Microsoft.