1. Download Blancco ISO image from the Blancco product download page.
2. Download and run a puclicly available tool to check SHA256 checksum of downloaded Blancco ISO image, for example MD5 & SHA Checksum Utility.
3. Compare the Blancco ISO SHA256 checksum given by the tool and informed in the Blancco download webpage.
If checksums doesn't match please submit an issue ticket in Blancco support portal.