Post-EOL security patches, often sourced from the Microsoft Update Catalog or through third-party tools like Simplix UpdatePack7 , which integrates updates directly into the installation media.
The term "pre-activated" means the ISO has been modified to bypass or automate the activation process. windows-7-ultimate-sp1-update-2021-preactivated-iso-gratis
Official support for Windows 7 ended in January 2020. ISOs labeled "2021 Update" (or later) are rather than official Microsoft products. They typically include: Post-EOL security patches, often sourced from the Microsoft