Clean install is your only option.
Your post implies that after finding GPs enabled, you set about trying to fix it, via many suggestions on other forums - so there's a high probability that one of these things has impacted the o/s. That's how I read it anyway.
Assuming you're on W10, hold Shift when clicking reboot and pick the option to reset your PC - that will revert to a clean install of Windows. Think there's a restore in there too, so you can at least try that first. There will be guides online to help navigate the advanced startup area.
Regarding the GPs - I don't ever recall seeing anything changed from 'Not configured' out of the box, so don't understand why/how these might have changed, but that's by the by now.