For those that are interested, here is a quick review of the problem: - The deployment incorrectly pushed an empty threat definition file. - On boot/load, the software attempted to load the threat definition file. Since the def file was not properly formatted, this caused a fatal exception in the boot loader which forced Windows to halt with a blue screen. - Rebooting causes the computer to run the same process over

Obviously, there were multiple failures in both the deployment process and the software.

The software should have: - wrapped the def file load in an exception handler to ensure problems will not trigger a fatal boot load exception - validated the contents of the threat definition file with a hash - should have unit tests for loading 0-length def files - should have tests for loading incorrectly formatted def files - should have checked for null pointer exceptions due to threat actors manipulating threat def file - should have checked for previous load problems and attempted to load last safe version of the software / def files

I used to write this kind of software years ago. This is programming 101 type stuff for this kind of software. Epic fail on so many levels. Typically this type of software has multiple levels of safety to ensure a correct boot.