MD5 HASH: FILENAME: 2F03B9945C2C40A3A78B060259233DE6 HS_CD1_2014_APRIL30.iso 7C5D5F1F838A8D97CD07075853E34DFD HS_CD2_2014_APRIL30.iso BFD865BB544479A66CB668439E5FC378 HS_PC_CD_2014_APRIL30.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_2014_APRIL30.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.