UEFI and Secure Boot compatible PCs/Operating Systems prevents Data Control from working
Please increase development effort on the re-engineering of DLP so it does not use the AppInit_DLLs and therefore can have Secure Boot enabled.
Microsoft post in May 2018:
The AppInitDLLs mechanism is not a recommended approach for legitimate applications because it can lead to system deadlocks and performance problems.
The AppInitDLLs mechanism is disabled by default when secure boot is enabled.
Using AppInit_DLLs in a Windows 8 desktop app is a Windows desktop app certification failure.
Do we have any updates regarding this, the KB article (120861) about this issue was last updated in Jan 2020
Matt Torley commented
The first Sophos KB article about this is from 2014!
That means Sophos has gone for almost 6 years without getting their DLL's signed or figuring something else out.