[cxS]

Let me simplify this for you. Windows does not protect your files, at all.

By booting from a separate operating system that is not secured, you can then access all files.

Ophcrack then takes the file with the stored hashes of passwords and attempts to crack the password.
Konboot just bypasses the password part of Windows, and logs you into the admin account, automatically.

Exactly what this guy said. Which is why you can see the System Volume Information and everything while in Linux if you have access to a Windows Installation. I use Linux to repair Windows lol.