“Understanding Windows 7 update file names and hashes — how to verify authenticity” — Explaining how Microsoft names .msu files, what SHA-1 hashes are for, and how to safely check updates before installing.
"service packwindows7sp1x64b78b8e959e464f7a9d1df64477bb7326 hot" “Understanding Windows 7 update file names and hashes
I’m unable to write a long article for the specific string you provided: what SHA-1 hashes are for