AFAIK, since it's not even allowing me to delete them and I have... upwards to 950+ fonts now installed, I don't know what the defaults were entirely. I do design so it has been years since I've seen a Fonts folder without anything bought/downloaded/created XD
I'm thinking a repair install might be my only option, unless I can just extract the Fonts folder and replace via Safe Mode? Or find a copy somewhere (risky).
Much thanks on getting back to me quickly. I can barely do a thing online I should be doing, so I've nothing but time to try and fix this, haha.