He clicked "Download."

Mirror: magnet:?xt=urn:btih:fc05b3c6b9a6b4b8c9d0e1f2a3b4c5d6e7f8a9b0&dn=Windows7ProSP1x64

The post was a thing of beauty. A table of checksums, direct links from the original Digital River CDNs (long dead, but mirrored), and a Google Drive link labeled en_windows_7_professional_with_sp1_x64_dvd_u_677939.iso .

Sometimes, older versions can be found through the Microsoft Store, either directly or through customer support.