Just between you and me, I’ve heard that one could obtain copies of Windows 7, including builds newer than the public betas, from some not-so-sanctioned sources. Of course I would know very little about how this works, but I understand that there is a process of verifying the integrity of files to ensure files are as described and have not been tampered with, however not everyone does this.
Leading up to the inevitable leak of the Windows 7 RTM build like a bottle of champagne shaken once too many times, I wanted to make this process of verifying file hashes even simpler by making it easy and convenient to generate and compare the hashes. With the help of Sven Groot, we came up with this little applet for your Windows 7 ISO verifying pleasure.
It couldn’t be any easier to use. Simple drag and drop an .ISO file onto this EXE, or double click on it and navigate to the file, then sit back and relax whilst it crunches the numbers. Once it generates a hash, it’ll compare it with a list of known and trustworthy hashes of ISOs to tell you exactly which build version and architecture it is known to be. This list will be updated live over the web so you won’t have to redownload the app.
Disclaimer: Like most entrepreneurs, I take no responsibility for the consequence of using this application. The information is provided only as a guide and cannot be used as evidence in an internet argument.
Update: As a few users have noted, this only works for English versions of Windows 7 ISOs so far.
Update 2: Added support for official retail US English RTM ISOs.
Update 3: With the wider public release of Windows 7, this tool is no longer kept up to date with the many and numerous versions of Windows 7 SKUs and languages. It is recommended you take personal care when using any ISOs.