Windows 10 STIG Version Comparison

Windows 10 Security Technical Implementation Guide

Comparison

There are 5 differences between versions v2 r1 (Nov. 13, 2020) (the "left" version) and v2 r2 (May 4, 2021) (the "right" version).

Check WN10-00-000015 was changed between these two versions. Green, underlined text was added, red, struck-out text was removed.

The regular view of the left check and right check may be easier to read.

Text Differences

Title

Windows 10 systems must have Unified Extensible Firmware Interface (UEFI) firmware and be configured to run in UEFI mode, not Legacy BIOS.

Check Content

For virtual desktop implementations (VDIs) where the virtual desktop instance is deleted or refreshed upon logoff, this is NA. Verify the system firmware is configured to run in UEFI mode, not Legacy BIOS. Run "System Information". Under "System Summary", if "BIOS Mode" does not display "UEFI", this is finding.

Discussion

UEFI provides additional security features in comparison to legacy BIOS firmware, including Secure Boot. UEFI is required to support additional security features in Windows 10, including Virtualization Based Security and Credential Guard. Systems with UEFI that are operating in Legacy BIOS mode will not support these security features.

Fix

Configure UEFI firmware to run in UEFI mode, not Legacy BIOS mode.