Comodo Disk Encryption

Comodo Disk Encryption offers a simple and effective solution to protect your confidential data. It can encrypt any drive and block their access by offering several methods. For example, you can require password authentication to access to a drive, use a USB key or a removable storage device as a data encryption key or, for a better result, the combination of the two proposed methods.
ComodoDisk Encryption is a free data encryption software published by "Comodo Group".