(2019/04/05) Checksums provide a way to confirm files downloaded from web sites are the same as those posted, and the files not been modified while traveling the web. The checksums we post have been computed with the SlavaSoft fsum utility. Free copies are available from their web site: Web site: www.slavasoft.com Utility: fsum.exe Version: 2.52.00337 Fsum provides many algorithms for computing checksums. Two popular ones are "MD5" and "SHA256". Both are computed for all the files on our Download page and the resulting checksums included in the file SrCheck.txt. Checksums are long and difficult to verify by eye. To make life easy, the SlavaSoft utility can automatically compare the checksums of your downloaded files against those in SrCheck.txt. Do the following: 1) Download the files you desire to a temporary directory 2) Also download a copy of the SrCheck.txt checksum file to the same directory 3) From a command line prompt run: "fsum -c SrCheck.txt" Running fsum this way computes the checksums of the downloaded files and compares them against those listed in SrCheck.txt. Any differences will be reported to the screen. Do *NOT* use files with errors !! You may have concerns about SrCheck.txt being modified in some malicious way while on the web. To help guard against that we post the checksums of SrCheck.txt itself on our Download page. You must compute and check those numbers by hand. If your downloaded files pass the "fsum -c" checksum test it is very unlikely they have been corrupted ...