IF you want to remove the Windows password

Reboot your pc and Press F8 go to safe mode.

1)First go to the safe mode and enter the computer
2)Go to control panel
3) go to User Accounts.
4) Remove user account .
note : you either get a administrator account
or you can just type administrator in the username and enter then go to user accounts and
remove password (in safemode it doesnt ask for the earlier password ) then enter normally.