I have lost my Windows 7 password, and I don't know how to break in
efficient way. So I can't login my computer now. I just heard some
professional tools about Windows password reset, such as Windows
password key. But I don't know whether it works on my computer or
not. Please help me.
Honestly, you've posted to a page that allows Mac and Linux users to run Windows application on their preferred operating system.
Unless you're planning to run Linux on a USB stick to recover your system, you are likely not in the right place.
I would recommend a different Google search for help with this question.