For most of its online history, Microsoft made ISO checksums/hashes publicly available on TechNet and MSDN (even if with a free Microsoft account), but since late 2017, a paid Visual Studio account is required (starting at $1,199 per year) to access the database.
A number of projects have sprung up to keep this important information accessible:
Microsoft SHA1 Hash Archive from my.visualstudio.com: Currently lists 94,980 files. Maintained by Jan Krohn, author of Microsoft Windows and Office ISO Download Tool, mentioned back in 2017. The free service has won glowing praise from Samir.
List of files by Microsoft: "This project contains all necessary information on files (family, the version, language, a hash sum [MD5, SHA-1, SHA-256 and SHA-512] and also their actual size)." Browse or search the database of 114,610 files.
MSDN.SU: "Technical information about the files available for downloading on official site from 'MSDN Subscriber Downloads' section." 42,512 files.
Windows and Office Genuine ISO Verifier: Standalone, freeware .NET app that "allows verification of Windows and Office x32 x64 (ISO, EXE ...). Finds ISO hash and compares it with the official hash (MSDN, VLSC)."
msdn-mirrors: GitHub repository last updated July 7, 2020; primarily focused on Chinese and English versions.
List of MD5/SHA1 hashes for various Windows OS ISOs: Modest list of some Windows 2000 through 7/2008 distributions.
/windows | Jan 02, 2023
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