forgot password or pin

On login screen you can run utilman.exe for accessibilty features...the idea is to change what will be executed when one runs the utilman.exe/accesibilty feature

You can use any of the following method depending on your use case

Method 1

press and hold the shift key and reboot your system to boot into your recovery environment

you can also use a live usb with a windows installation on it and press shift + f10 to get the recovery environment

once you get a cmd prompt locate yours windows installation drive and navigate to windows/system32 folder

ren utilman.exe utilman2.exe 
copy cmd.exe utilman.exe

If you have dual booted and you are currently on a linux machine ,you can mount the windows drive and navigate to the same windows/system32 folder and using your root account execute the foolowing command

mv utilman.exe utilman2.exe 
mv cmd.exe utilman.exe

Reboot

When you press the accesibilty festure the command prompt shows up and running the whoami command shows the user NT system authority is currently logged in.With this coomand prompt we can

-create new users with admin privileges 
-reset passwords for other users

net user johndoe password123  -- to change a particular users password
control userpasswords2 -- reset user passwords

Method 2

regedit

HKEY_LOCAL_MACHINE

file -- load hive

Navigate to windows/system32/config

open file SYSTEM

Create a new folder New folder

Open this new folder

Cmdline -- cmd.exe SetupType -- numder 2

Select new folder and unload hive