MD5 HASH: FILENAME: 255e93c90b187b9648ba40810a41728d HS_CD1_2013_MARCH5.iso 5c5e50169de5855eac52c0ed79396f2c HS_CD2_2013_MARCH5.iso 44f32423ee66bbc189f8a73460b44eb8 HS_PC_2013_FEB19.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_CD1_2011August10.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.