 Today we will show you how to run an MD5 checksum to check the integrity of your research files using MD5 Summer. To begin you will need to download and install MD5 Summer onto your Windows computer. Here I have two test files. If we open them we can see that they contain information. Once we open MD5 Summer we are greeted with the following screen. First we need to identify where the files are located on the computer. Then we need to select the create sums option and select the files we wish to check sums for. Click the add button and then OK. Next we are prompted to save a file with the MD5 checksums in. If this is successful a green circle will appear by the file name in MD5 Summer as seen here. This window can now be closed. To verify the sums we need to use the verify sums option. We then select the checksums to be checked and as we can see the files match. Again we can now close the window. However for this example I will now go back to the original file and change some of the data within it. Here I will change one of the Bs for AC and save the file. Now when we run MD5 checksum again we can click verify the sums. As you can see the program has identified that there is an error and a difference between the two files. This concludes our tutorial on checking the integrity of your research files using MD5 checksums. Thank you for watching.