Deep Freeze Overview Deep Freeze protects the boot drive (where the Operating System is installed) and optionally, other drives on your computer. Deep Freeze protects the installed programs when they are installed on the drive protected by Deep Freeze. Deep Freeze also manages the user profiles on the computer. The user’s home directory stores the preferences of the user. The user’s home directory also stores data such as, documents, Internet Favorites, and music. Deep Freeze has two states: • Frozen — is the protected state where any changes, whether malicious or unintentional, are reversed on restart. • Thawed — is the unprotected state where changes made to the computer are permanent and not reversed on restart. Deep Freeze protects the computers that are set to boot from the hard drive. Deep Freeze cannot protect the computers that are set to boot from an external drive (USB, FireWire or Thunderbolt) or from a hard drive where Deep Freeze is not installed.