I am not sure why it is CPU specific. I installed it, against my better judgement, while running an overclocked 5820K...
One shouldn't update your BIOS or install an OS when overclocked, even if you are stable, just in case. Chances are nothing will happen, but, I have seen problems with people 'thinking' they are stable and only to have something like that bork on them. Reset to stock and update/install went fine.
So trents, the G3258 you were using was overclocked when it didn't work?
Yes. Did you try dropping the G3258 back in the W10 machine and see if it can now overclock?
No. Did you confirm installing at stock speeds works?
No, but at least some G3258 owners got it to work after returning it to stock condition. But I'm not sure, as I have checked around on the forums, that has worked for others. I'd love to hear an update (and edit the first post as needed).