Microsoft hates you.
Check your system clock's date.
Certificate is fine.
Try to browse in private mode to see if you get the same issue.
Also, this can happen when you use some Tor nodes/exits or some (shady aka free) VPN services.
Gab has been giving me similar errors on brave.
I do not have the same issue on my desktop (windows11) with any browser For me, I believe the issue is this older laptop (the one I posted about) that is running Windows 7, and not the most up to date copy either as it was having issues with some updates (when they were supported) and I left updates off. I wouldn't have noticed if I didn't stray out of Firefox. It's really odd and it bugs me but it's kinda my garage stereo, lol so I'm not gonna worry about it. If you are still, I would follow some of the advice given here, there were a couple really good things to check, system time/date for example have a nice day!
Watch whatever network you're on. They are probably trying to deploy a man in the middle attack.
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