What i would do is keep guessing every password you would use or you think tou would use because i forgot my iPod touch password and i kept guessing every password i would use then it just came to me. this can work it might drive you crazy like it did for me but just try to keep calm!
If you have forgot your password you have to reset it via computer
How to unlock my windows phone if i forgot password
If you forgot your password and can't unlock your Galaxy Nexus, an option would be to use your Gmail email and password to unlock. If that doesn't work, the only remaining option is to reboot your phone into recovery and do a factory reset.
dont you hook it up to a computer with itunes and reset it?....yeah try that.
If you are using a purchased software, then contact the vendor. If you forgot a password for your home PC operating system, the only way to reset that is to totally reload the OS (windows).
Check my guide on how to unlock screen on any LG device unlocky.org/unlock-screen/how-to-bypass-lg-lock-screen-without-reset/
You would request a password reset.
Reset
If it's a desktop computer and you forgot the BIOS power-on password, you can reset the BIOS by closing the "cmos reset" jumper on the motherboard.
restore it
You don't have to factory reset the device if your cousin forgot the password. Just use the link that says, 'forgot password' and a link will be emailed that will allow her to get in and change the password.
If you forgot your Bella Sara password, you should visit the Bella Sara website and look for a "forgot password" or "reset password" option. Follow the prompts to reset your password by entering your email address associated with your account. You should receive an email with instructions on how to reset your password.