Given Windows 7 EOL, the highest quality and secure path is migrating to Windows 10 or Windows 11 (on supported hardware), or using Windows 7 in a virtual machine (e.g., VirtualBox) with network access disabled or heavily restricted.
An authentic "Windows 7 64-bit SP2 ISO" is a standard x64 ISO image that has been slipstreamed with the following: Windows 7 64 Bit Service Pack 2 Iso Download High Quality
A "High Quality" ISO means it is untouched by malware, free of "optimizers" or "crackers," and matched perfectly with Microsoft’s official SHA-1 hashes. Given Windows 7 EOL, the highest quality and
Since no official SP2 ISO exists, building your own is the only way to guarantee "high quality." This is what IT pros do. An authentic "Windows 7 64-bit SP2 ISO" is