Windows 7 ISO Verifier will verify your copy of the Windows 7 ISO. It couldn’t be any easier to use. Simply drag and drop an .ISO file onto this EXE, or double click on it and navigate to the file, then sit back and relax while 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
Windows 7 ISO Verifier Download:
http://www.istartedsomething.com/20090706/windows-7-iso-verifier/