All the structures needed by your operating system to recognise a file system of a particular type, such as FAT or NTFS, are made available through the TurboCrypt encryption driver. The plug-and-play TurboCrypt encryption driver has been programmed especially for Windows 7 (64/32 bit) and Windows Vista (64/32 bit) Operating Systems and is backward-compatible with Windows XP. TurboCrypt is the only commercially available disk encryption software that is immune to Mount Control Code Attack and Backup Attack. It is further the only commercially available disk encryption software that allows for totally secure password entry. The built-in Trojan-Horse-proof Virtual Keyboard prevents malicious software like Trojan Horses and Computer Viruses from reconstructing user entry from mouse movements and screen logs. The Free Edition is a full version that allows users to mount a virtual volume of up to 16 Megabyte size without password limit. As hidden volumes require host volumes to be at least 256Mb in volume size, this feature is only available with the following versions: