Hi, I am having a very similar problem. I altered System Config to start in Safe Mode, only to be greeted upon restart by the "Something happened, and your PIN isn't available" message. I don't think I ever set up a password for the account and I have to say that the Microsoft GUI even recommends using the pin above other options, so how on earth could I have known that altering the Sys Config will brick my laptop? So, stating that, "This is why it's generally recommended to have a password backup" honestly makes me a little angry right now, as I am not sure where this is supposedly generally recommended and why there is no warning in Sys Config that altering the settings will make the pin obsolete.
Anyway, forcing Windows to exit safe mode isn't working for me, and I am now trying to use the media recreation tool via USB, but it doesn't recognize the harddrives, as I presume it only sees the bootable USB itself and cannot access any driver information locked away behind the Sys Config brick wall. Therefore, the mentioned Disable Driver Verifier option doesn't work for me either, as the command line only addresses the USB media and not the hdds.
I can see that others pressed the "I have the same question" button, which is alarming, and I would be very grateful for any further, non-circular assistance to us accidentally bricked Windows users!