MD5 HASH: FILENAME: dc19416865974e30132d7bdcf5f75af1 HS_CD1_2013_JULY25.iso 202103c5bac5dc090433397162d2dd2d HS_CD2_2013_JULY25.iso 4028a99ed112b410bc6b0e6f8e1b01a9 HS_PC_UNIX_2013_JULY25.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.