Encryption: Chrome local password recovery from dead PC

This has already been answered in SuperUser, I think:
Recover from external hard drive

The Nirsoft Chromepass software can read passwords in Chrome from an external hard drive if you remember your Windows login password. You need this password:

To use this function, you must know the last login password used for this profile, since passwords are encrypted with the SHA hash of the login password, and without that hash, passwords cannot be decrypted.