DiskCryptor is a free and open-source full disk encryption system for Microsoft Windows. It allows a PC’s entire hard drive or individual partitions to be encrypted, including where the OS is installed.
DiskCryptor uses either AES-256, Twofish, Serpent or a combination of cascaded algorithms in XTS mode to carry out encryption.
DiskCryptor has not been updated since 2014. VeraCrypt is now used as an alternative.