Using Deep Freeze : Drives Tab

Drives Tab
When the Drives tab is selected, Deep Freeze searches the computer and lists the drives present on a computer. The drives listed can be put into a Frozen state or a Thawed state.
 
All drives on the computer are initially Frozen by default, unless otherwise specified in the Deep Freeze Installer. If you have created a partition to save user data and did not designate it as a Thawed partition in the Deep Freeze Installer, put that partition in a Thawed state by deselecting the corresponding check box in the Frozen column.
To save any changes made, click Apply; the changes take effect after a restart.