Frozen Drives By default, all drives are Frozen. To put a drive in a Thawed state, clear the checkbox of the preferred drive. While only local drives (partitions or physical drives) can be Frozen, all drive letters are shown because the pre-configured installation file may be installed on many computers with various hardware and software setups. Example In the above screen, the D: is not selected from the Frozen Drives list. Therefore, all drives except D: are Frozen.