Hi Mykola,
My name is Jocelyn, an independent advisor here to help.
Sorry to hear about your troubles. Please try the following fix and check:
- Refresh your Network connection
Unplug your router or modem from its power outlet.
Wait 30 seconds, then plug it back in.
Allow the device a minute or two to turn back on.
Then try it again.
- Boot your computer in Safemode
Press and hold the SHIFT key on the keyboard. With this key still pressed, click or tap the Power button on the login screen and, in the menu that opens, click Restart.
After your PC restarts to the Choose an option screen, select Troubleshoot > Advanced options > Startup Settings > Restart.
After your PC restarts, you'll see a list of options.
Select 5 or press F5 for Safe Mode with Networking.
If you can log in on safe mode, you try changing your PIN.
Reset your PIN:
- Open Settings.
- Click on Accounts.
- Click on Sign-in options.
- Under the PIN section, click I forgot my PIN.
- Verify your password and hit OK.
- On the next screen, create a new PIN and follow the on-screen instructions.
- Restart your PC and check if you can log in with the new PIN.
If the solution doesn't work, I would suggest you follow the steps provided in the mentioned article below and see if it works for you
https://www.thewindowsclub.com/pin-does-not-wor...
I hope this would fix your issue. Let us know if you need anything else.
I hope this would help.
Best,
Jocelyn