Windows 10: PIN Entered Incorrectly Too Many Times

My friend was at my house a couple days ago and entered random PINs many times. Now when I try to sign in it makes me enter A1B2C3 and then I can enter my PIN, but even when it is entered correctly, it comes up with the screen saying that it has been entered incorrectly too many times. The button for other sign in options does not show up.

:)

 

Required to type 'A1B2C3' before entering PIN

As of a week ago, I have been receiving the error message, "You've entered an incorrect PIN serveral times. To try again enter A1B2C3 below." The problem with that is that I have never entered my PIN incorrectly and am the only one that utilizes my desktop. I have ran malware/virus scans and have turned up zero discrepancies. Additionally, I reinstalled Windows 10 (and activated) a month ago after upgrading my motherboard, processor, and memory. So why is it asking me to enter in this letter/number combination EVERY time despite never having entered in my PIN incorrectly? This is rather annoying and essentially a two-step authentication factor, of sorts, that I did not ask for. Is anyone else experiencing this?

 

Entered an Incorrect PIN too Many Times

I will try waiting several days as you did. When steps are suggested they aren't understanding that there are no choice...the screen just says you have entered the wrong pin too many times....that's all. Then restart your computer. No other choices are
on the screen.

 

Can't enter PIN for Headset

I'm grateful for your replies. I obviously haven't done a good job of explaining. Here are snips of the windows involved. I have done all the steps suggested, but I can't directly enter the PIN in the larger window. That seems to be my only problem. Plantronics hasn't answered yet, but I'll hope they come through.