Windows 7 Ultimate Lite Edition 700 Mb Only Iso -

This is the big one. Since you cannot run Windows Update (the required services are gone), you will never receive security patches. The OS is frozen in time. Moreover, because these ISOs are distributed via torrent sites, Mega, or MediaFire, they are frequently bundled with:

: Aimed at reviving "ancient" computers (Pentium 4 era) or low-spec netbooks by reducing system resource usage. Windows 7 Ultimate Lite Edition 700 Mb Only Iso