Archive.org serves as a primary repository for Windows 7 ISO files, offering various community-uploaded OEM and retail versions for download. Users should prioritize verifying SHA-1 hashes to ensure file integrity and safety, as official Microsoft support ended in January 2020. You can explore available Windows 7 files on Archive.org.

The Internet Archive hosts a substantial collection of Windows 7 ISOs under its "Software" or "CD-ROM Images" collections.