Ophcrack for Linux is a free Windows password cracker based on rainbow tables. It is a very efficient implementation of rainbow tables done by the inventors of the method. It comes with a Graphical User Interface and runs on multiple platforms. Cracks LM and NTLM hashes. Brute-force module for simple passwords. Audit mode and CSV export. Real-time graphs to analyze the passwords. Loads hashes from encrypted SAM recovered from a Windows partition, Vista included.
When I went from Windows 7 to 10, the upgrade disabled all accounts except for one user and an admin I did not have the password for. Fortunately my main OS is Linux and this tool allowed me to enable all accounts on my dual boot laptop, even without changing passwords.
Cons
did not see any at all
Summary
When I was a Windows only XP user I used this same tool. You just create a Live USB Linux systemrescue with Ophcrack, so this tool can help Windows only users. With a dual boot (Mint 17.1) using this tool was amazingly simple but powerful.