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Solutions: Sometimes changing the used USB memory stick brand or model (different size) can make a difference. For example 64GB or larger USB sticks may not work if they can't be formatted to FAT32. Also encrypted or password protected USB sticks are not supported for USB booting. Some of the most reliable models for USB booting are known to be 8GB or 16 GB Kingston DataTraveler (non-encryped or non-password locked). If the same USB stick fails to boot in different computer models, it is recommended to try another USB stick model. Also make sure that the format option is enabled when creating the bootable USB. If you continue having problems, ensure that the ISO image file is not corrupted by downloading it again or testing it by booting from a CD or Virtual Machine for example. Check that the file name does not contain empty spaces or special characters and try creating the USB stick again with the 'Format' option selected using the latest version of Blancco USB Creator tool.