DVDsig scans all files in a directory structure to verify that files have not been changed or corrupted. Although named for checking external media (DVDs), the program can monitor any folder or folders for changes.

For use with CD/DVDs:

1. Place dvdsig.exe in the top-most folder you wish to check and run the program
2. Click "Scan" and wait for the check program to check all files
3. Burn the files (including dvdsig.exe and dvdsig.md5) to your disk
4. To check the results, run dvdsig.exe from the disk at any time to verify file integrity

The program uses the MD5 checksum algorithm.