Same issue locked out cant sign in
No actual support option. Now 2 days I've been locked out say to many attempts with wrong pin. (Same pin I've used for a year now. Won't let me change the pin or password.
It's a laptop and shut it self down to power save. Can't even get in to reset that option. Endless cycle of cr*p
I had the same problem suddenly appear yesterday.
It's an old Laptop that I still use regularly to backup stuff and go to online keeping my main Windows Laptop 'clean' and I've never seen it before.
After 30mins of frustration I solved it by resetting my PIN via my Microsoft password.
I could not remember the password as I rarely use it (I've always used the same PIN on the Laptop) but fortunately I had set up 2 Factor Authentication so used the App to reset the Microsoft Password to then be able reset the PIN (I used the same PIN again so there was actually no change)
Once I did that I went to the startup PIN login Screen, typed in my 'new' PIN and got straight into the Laptop.
Bit of a unnecessary faff for something that shouldn't of happened in the first place, but it worked.
I hope this helps.