Check my comments and questions in red bold (below)
All H_C changes are wiped out when using the restore point (you have done it already).
As you know, the Windows restore point failed to wiped out HC
All H_C changes are related to "HKLM\Software" and "HKLM\System" registry hives.
Yes, correct but what not enough for me.
The Best is to restore all the registry hives: Sam, Default, Security, Software and System
So the changes in the registry made by H_C should be already wiped out, before you restored the registry hives.
Yes, it should be indeed but why I got this ? Check again this post Discuss - Hard_Configurator - Windows Hardening Configurator