The file represents a "grey-market" OS distribution. For any user prioritizing data integrity and security, it is always recommended to download official media directly from the Microsoft Software Download page and use a legitimate license key. Relying on community-repacked ISOs is a gamble where the cost of a data breach far outweighs the convenience of a pre-activated installer.
: The ability to create a "snapshot" of a hard drive for backup before performing a clean install. Is This a "Clean" Version?
: The official way to create a bootable USB or download a standard ISO.