If you have a specific goal, I can guide you on the safest way to find it.
Hosts community-curated ISO files that are generally more transparent and less likely to be infected than random direct-download zips. Download vista(win7) zip
Usually, these are not official Microsoft ISO files, but rather raw system files, pre-installed Virtual Hard Disk files (.vhd, .vmdk), or modified installation files intended for clean or quick installation. If you have a specific goal, I can