If you must use Windows 7, it is safer to download an "untouched" official ISO and update it yourself: How to get updated windows 7 sp1 iso?
Many include .NET Framework 4.8, DirectX, and Internet Explorer 11 pre-installed. Understanding "Pre-Activated" ISOs
Using pre-activated software is a significant security risk. Because the system files have been modified, these ISOs can contain embedded malware, keyloggers, or backdoors that are difficult to detect. Reliable Sources and Custom Creation windows-7-ultimate-sp1-update-2021-preactivated-iso-gratis
The term "pre-activated" means the ISO has been modified to bypass or automate the activation process.
Often used in "All-in-One" (AIO) versions, this uses a local service to manage activation. If you must use Windows 7, it is
The essential foundation for any modern Windows 7 installation.
Newer ISOs often include USB 3.x and NVMe drivers to allow installation on hardware that originally didn't exist when Windows 7 was released. Because the system files have been modified, these
The most common method, which mimics an Original Equipment Manufacturer (OEM) BIOS signature to trick Windows into thinking it is on a licensed machine.