Screenshot of AS-CRC32 1.20
This program can check (with some certainty) whether a file has been modified or damaged, provided that you have calculated the CRC32 value of the file before. The program generates a 32-bit value with the algorithm CRC32 by reading the entire file and making calculations on its contents. CRC is an abbreviation of Cyclic Redundancy Check.
> Download AS-CRC32 1.20 (Zip, 1.18 MB)
Revision Date: 2021-03-06.
Unicode Support: Yes.
Program Type: Partly portable, x64.
Operating System(s): Windows 7 (SP1+), 8.1 and 10. (Also Windows Server 2012 R2 and 2016.)
Language(s): English and Swedish.
This is the program's official website - download the program here to get the latest version/revision. The program is free.
If you have User Account Control (UAC) activated you have to run AS-CRC32 as Administrator in order to add/update or remove the integration feature. This can be done by right-clicking on the EXE file. (Note: When you make a larger Windows upgrade, this integration may be cleared, then you need to add it again.)
The only thing that is not portable is the integration feature, but this has to be activated manually. The integration feature writes to the registry (the key "HKEY_CLASSES_ROOT").
You can also download AS-CRC64 1.20 where the only difference from this program is the calculation routine.