Drive Encryption 7.4.2 Hotfix 1 Release Notes

Information about Trellix Drive Encryption 7.4.2 Hotfix 1 release

This hotfix contains resolved issues.

Release date — January 30, 2024

Release build — 7.4.2.23

Note: This hotfix does not support the automatic upgrade of a pre-release software version. To upgrade to a production release of the software, you must first uninstall any pre-release versions.

Rating

The rating defines the urgency for installing this hotfix.

This release is high-priority for all environments. Failure to apply a high priority hotfix might result in potential business impact.

Resolved issues

This hotfix addresses customer-reported issues.

For a list of current known issues, see Trellix Drive Encryption 7.x Known Issues (KB84502).

Reference	Resolution
MDE-8739	This hotfix ensures that the Drive Encryption drivers used for Microsoft Windows 10/11 in-place upgrades are updated to the latest version. Older drivers were used during in-place upgrades and resulted in one of the following situations: An intermittent Blue Screen of Death (BSOD) during the Microsoft Windows upgrade process itself which caused potentially unbootable systems. In the case of a successful Microsoft Windows upgrade, the original drivers became the drivers installed in the operating system so future intermittent Blue Screen of Death (BSOD) issues were then possible. The intermittent Blue Screen of Death (BSOD) issue can be caused when other software on the system is using SSE2/XMM CPU registers at the same time as the Drive Encryption drivers. This hotfix eliminates the risk of either of these situations occurring.

Reference

Resolution

MDE-8739

This hotfix ensures that the Drive Encryption drivers used for Microsoft Windows 10/11 in-place upgrades are updated to the latest version. Older drivers were used during in-place upgrades and resulted in one of the following situations:

An intermittent Blue Screen of Death (BSOD) during the Microsoft Windows upgrade process itself which caused potentially unbootable systems.
In the case of a successful Microsoft Windows upgrade, the original drivers became the drivers installed in the operating system so future intermittent Blue Screen of Death (BSOD) issues were then possible.

The intermittent Blue Screen of Death (BSOD) issue can be caused when other software on the system is using SSE2/XMM CPU registers at the same time as the Drive Encryption drivers.

This hotfix eliminates the risk of either of these situations occurring.