Elina ANN

you can reset Windows 7 password with '''++Chntpw++'''. It will be a little complicated. And also, you can use the professional tool like iSunshare Windows Password Genius. It can help you to create a recovery disk on any other accessible computer . Then you can reset Windows 7 password easily. But it will not help you find back the previous password.

This guide might contains what you need to reset BIOS password: https://www.wikihow.com/Reset-a-BIOS-Password.