23-05-2021

How To Verify Checksum With Windows 7 Iso Download

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MD5 checksum or MD5 hash is an unique fingerprint of a computer file, regardless what file format it is. Similar to other file verification algorithms, the ultimate purpose of calculating MD5 checksum is to verify the genuineness of the file.
How does MD5 checksum works or why MD5 checksum is important to you?
In order for publisher to assure recipients that the file received has not been infected by virus, tampered by hacker, corrupted by incomplete download, etc, the publisher calculate and publish the MD5 checksum of the file.
The recipients responsibility is to calculate and verify the file MD5 checksum against the one published by publisher.
So, the 2-way process is basically calculate-publish and calculate-verify!
Now, how to calculate MD5 checksum of a file in Microsoft Windows?
Most Linux distributions come with md5sum program for one to calculate or check MD5 hash of files. Unfortunately for Microsoft Windows users, there is no file verification program bundled with the default installation, not even found one in the Windows 7 Ultimate edition! (Let me know if I am wrong.)
Good news is that there is no short of md5sum for Windows and most of them are available as freeware! Instead of listing all of them here, I would like to recommend you md5sums.exe by Jem Berkes.
The md5sum for Windows, a 28KB command line file verification utility available for download from PC-Tools.net.
Better than the md5sum for Linux, this md5sum for Windows is capable to display the progress of calculation which is useful if the file size is big (e.g. DVD ISO image file). Besides, the -s option switch can be used to display speed of calculating MD5 checksum (hashing speed).
While Jem recommend its usage by dragging one or more files over md5sums.exe to generate MD5 message digest of respective files, I prefer to use it in Windows Command Prompt as if I am using the Linux version of md5sum:
1) Save the md5sums.exe to C:Windows folder as md5sum.exe
2) Whenever there is a need to calculate MD5 message digest of files, I open Command Prompt window in the target folder path and execute md5sum target_file where target_file can be one of more files.


  1. I found that Microsoft has an unsupported command line utility called FCIV which can be dropped in the system32 folder and can generate md5 and sha1 checksum. It appears to be designed to checksum a large set of files to an xml file, and then be run again at a later date to ensure the checksum match and there have been no files altered.

    It works in Windows 7 for me.

    Hopefully this functionality will be added to all versions of MS OS’es in the future.

    Michael

  2. Thanks, man

  3. The other way would be to use the powershell:

  4. @Ren, thanks for sharing!

  5. “Better than the md5sum for Linux, this md5sum for Windows is capable to display the progress”

    The md5sum for Linux can display progression, you just need to install a GUI, don’t remember it’s name (the GUI name) but I used it to check Ubuntu’s ISO (10.04 and 11.xx) MD5sum

    Hackers won’t tamper files, because a hacker in NOT a cracker…

  6. This is off topic since this is a non-windows platform, but I’m sure somebody could use the info.

    On Linux or BSD machines, you can show progression of the md5sum with the use of the ‘pv’ tool.

    You may have to install this free tool on some distros (Debian, Ubuntu use ‘sudo apt-get install pv’)

    pv is a progress viewer. It acts like the ‘cat’ command except with a progress bar. Pipe the data into the md5sum command to show progress of md5sum.

    % pv bigfile.iso | md5sum

    You can even use it to copy a huge file and see progress.

    % pv hugefile.img | dd of=copyoffile.img

  7. You could install Cygwin to have a subset of Linux commands on windows. I ran this from Windows 7 with Cygwin installed.

    $ md5sum –help
    Usage: md5sum [OPTION]… [FILE]…
    Print or check MD5 (128-bit) checksums.
    With no FILE, or when FILE is -, read standard input.

    -b, –binary read in binary mode (default unless reading tty stdin)
    -c, –check read MD5 sums from the FILEs and check them
    -t, –text read in text mode (default if reading tty stdin)

    The following three options are useful only when verifying checksums:
    –quiet don’t print OK for each successfully verified file
    –status don’t output anything, status code shows success
    -w, –warn warn about improperly formatted checksum lines

    –help display this help and exit
    –version output version information and exit

    The sums are computed as described in RFC 1321. When checking, the input
    should be a former output of this program. The default mode is to print
    a line with checksum, a character indicating type (`*’ for binary, ` ‘ for
    text), and name for each FILE.

    Report md5sum bugs to bug-coreutils@gnu.org
    Report Cygwin bugs to: cygwin@cygwin.com
    GNU coreutils home page:
    General help using GNU software:
    Report md5sum translation bugs to
    For complete documentation, run: info coreutils ‘md5sum invocation’

  8. On Windows7 (I have SP1), you can use the following command from the cmd prompt:

    CertUtil -hashfile filename MD5

    where filename is the name of the file that you want to check.

The guide below is my newbie way of trying to explain how to check Linux Mint ISO's using MD5 and SHA256 checksums in a Linux or Microsoft Windows system. What is the difference regarding checking via MD5 or SHA256? SHA256 is a much more secure check than an MD5 check. That said, for most purposes MD5 is okay because it's reasonably secure anyway. But in the longer run I would guess Mint will abandon MD5 sums and transfer to SHA256 (or higher) - extra security at no extra price - go for it.

Step 1 - Get a Copy of the Official Checksums File(s)

For checking the MD5 and/or SHA256 of an ISO go here and get a copy of the checksums files for the version of Mint that you want to check: https://ftp.heanet.ie/pub/linuxmint.com/stable/ Tip: just click on the link that is the version number you want to check. (For the purposes of this tutorial I will assume that you want to check an ISO for Mint version 17.3.)

Once you are the correct webpage for the Mint version that you want to check right-click on the link titled md5sum.txt and select 'Save Link As...' and save a copy of the text file to your hard-drive. Follow the same procedure for the link titled sha256sum.txt if you want to check the ISO against a SHA256 hash number. If you do this for both files you will now have two text files on your hard-drive titled 'md5sum.txt' and 'sha256sum.txt' (If your browser doesn't have a right-click and download the text files function then just left-click on the two links and copy and paste the checksums hash information from the webpage into a text editor of your choice - remember to save them as 'md5sum.txt' and 'sha256sum.txt'.)
Now that you have the official checksum numbers on your hard-drive you can check the ISO(s) that you have against those checksums.

Step 2a - Checking the ISO Inside a Linux System

(If you want to do the check inside a Microsoft Windows system then skip this step and goto 'Step 2b' below.)
Launch a terminal and type the following (note you will have to adjust the command to suit the full path and exact filename to the ISO file you want to check):

md5sum /path/to/the/ISO/linuxmint-17.3-cinnamon-64bit.iso

Once the command completes (it will take some time, be patient) highlight and then copy the long complicated hexadecimal number that the command produces. Be VERY CAREFUL when you do this that you select ALL OF THE NUMBER and ONLY THE NUMBER, no extra spaces at the end. Now open the md5sum.txt that you created earlier in a text editor and do the following;

  1. Use the Search function of the text editor and paste the MD5 number you got for the ISO from the terminal command into the Search Text-box.
  2. Now click on the Search button
  3. If the Search function finds a match then your ISO is fine.
  4. If the Search function does not find a match then your ISO is either hacked or you have a faulty/corrupted downloaded ISO. (However, you should double check that you correctly copied the hexadecimal number properly.)

How To Verify Checksum With Windows 7 Iso Download Pc


You can then follow the same procedure to check the ISO against the SHA256 checksum - though, obviously, you need to make sure that you do the checking against the checksum information in the sha256sum.txt file you might have created earlier. If you want to do that check the command to use in the terminal is:

sha256sum /path/to/the/ISO/linuxmint-17.3-cinnamon-64bit.iso

Again you will need to provide the correct full path and exact filename for the ISO you are checking.

Step 2b - Checking the ISO Inside a Microsoft Windows System

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There are many programs available for Windows that will calculate the checksums of files. One that I am familiar with is the free version of 'MD5 & SHA Checksums Utility'. You can download a copy here: https://raylin.wordpress.com/downloads/md5-sha-1-checksum-utility/ (It is a portable program so you don't need to install it to the system.)

How

How To Verify Checksum With Windows 7 Iso Download Free

  1. Now launch the 'MD5 & SHA Checksum Utility' that you downloaded. In the hash-type selections tick MD5 and/or SHA-256.
  2. Click on the Browse button and in the file selector drill to the ISO file you want to check, click on that ISO and then click the Open button. The program will now generate the checksum(s) for the ISO you selected. (This might take some time so be patient.)
  3. Now open the 'md5sum.txt' and/or the 'sha256sum.txt' that you created earlier and from one of them copy the hexadecimal hash number for the ISO you want to check into the clipboard. You must be VERY CAREFUL when you do this that you select ALL OF THE NUMBER and ONLY THE NUMBER, no extra spaces at the beginning or the end.
  4. Now paste the hexadecimal number you copied into 'Hash:' field of the program dialogue window, then click the Verify button. The program will now tell you if the hash number matches.
  5. If the hash numbers do not match then your ISO is either hacked or you have a faulty/corrupted downloaded ISO. (However, you should double check that you correctly copied the hexadecimal number properly.)

How To Verify Checksum With Windows 7 Iso Download Software

Hope this helps.