MD5 HASH: FILENAME: 6b4293b3d97c4cad43ac16e94fbc9af6 HS_CD1_2013_AUGUST22.iso a03a88bf0d91823abd272de9cb3cfaeb HS_CD2_2013_AUGUST22.iso 6e876179feae1a3fa0b4809ba27290b4 HS_PC_CD_2013_AUGUST22.iso There are many MD5 hash checkers available on the web. Some are GUI based and others are command line driven. They are available for all Operating Systems. As long as it uses the MD5 algorithm, any program should work. Here is the link to an open-source Windows MD5 checking program: http://md5deep.sourceforge.net/ Once you have installed it, use the md5deep.exe to calculate the hash - example - md5deep.exe HS_PC_UNIX_2013_JULY25.iso You can then compare that string with the one provided above. Most programs like md5keep even allow you to check one or more MD5 hash strings from a file containing known hashes. Check out the MD5DEEP.txt file for more information.