Dell Security Tools update trashes Windows 10

This is a public bug report.

Dell Precision 3620 with Windows 10 version 1703 build 15063 here. At some point after initially booting up, the Dell software updater prompted me to update Dell Data Protection| Security Tools (to version 1.12.021), and after doing so, it had me reboot. This action appeared to have trashed Windows forcing me to have to reset the PC and erase the C drive. 

However, after going through the reset process twice, I ran the update a third time, but this time, Dell tech support had me turn off the secure boot in the BIOS and that magically allowed the bootup to proceed and Windows was, in fact, fine. (Who would have thought to do that?!) Needless to say, I removed the Dell Security software and turned the secure boot back on and all is well. Does anyone even know what this software does?

The tech support manager is reporting to me that so far, Dell engineering is refusing to fix this.