I've used the Speculation Control module in Powershell to verify successful mitigation for Spectre/Meltdown on servers running Server 2016 and Server 2012 R2. I am attempting to verify the same on Windows Embedded 8 Standard, but the output of the
command hasn't changed after following the same steps (BIOS update, OS patch applied, and registry keys added - including reboots):

Speculation Control Validation PowerShell Script
2018-01 Security Monthly Quality Rollup for Windows Embedded 8 Standard for x64-based Systems (KB4056896)
Has anyone had any luck with this?
Thanks!