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The protected partition discards all data writes upon system reboot.

Deep Freeze 661 was optimized for Windows 7, 8, and early Windows 10 (builds 1507–1903). If your organization runs or the latest Windows 10 22H2, this version may not function correctly due to driver signing requirements. Newer versions (like Deep Freeze 9.0 or 10.0) support NVMe drives and UEFI Secure Boot. deep freeze 661 full download exclusive

To prevent complete data loss for user files, administrators can create virtual partitions called ThawSpaces. Data stored in a designated ThawSpace or mapped to a physical secondary drive persists across reboots, even when the primary operating system partition is completely frozen. Deployment and Configuration Workflow The protected partition discards all data writes upon