As an open source (GPL license) program, it cracks Windows LM hashes using rainbow tables. The program includes the ability to import the hashes from a variety of formats, including dumping directly from the SAM files of Windows. There is also a LiveCD version which automates the retrieval, decryption, and cracking of passwords from a Windows system.
Want bypass the lost Windows 7/Vista/XP password, just go to the Ophcrack official website (http://ophcrack.sourceforge.net/)to download, burn and use the LiveCD version of Ophcrack. Or if you need reset lost Windows Server 2000/2003/2008 domain administrator password, please refer to Windows Password Breaker to reset Windows domain password.
After just a few minutes of running the software, Ophcrack will find all of your passwords and display them on screen! Yes, it’s that easy!
Software is freely available for download online
Passwords are recovered automatically using the LiveCD method
No software installation is necessary to recover passwords
No knowledge of any existing passwords is necessary
Ophcrack works will with Windows 7, Windows Vista, and Windows XP
Some antivirus programs mistakenly identify Ophcrack as a Trojan or virus
496MB (7/Vista) / 415MB (XP) LiveCD ISO image must be downloaded
LiveCD ISO image must be burned to a CD before being used
Passwords greater than 14 characters cannot be cracked
Opchrack can crack passwords for Windows 7, Windows Vista, and Windows XP.
Ophcrack can recover 99.9% of passwords from Windows XP, usually in a matter of seconds. Any 14-character or smaller password that uses any combination of numbers, small letters, and capital letters should be crackable.
Ophcrack can recover 99% of passwords from Windows 7 or Windows Vista. A dictionary attack is used in Windows 7 and Vista.
The Ophcrack LiveCD option allows for completely automatic password recovery.
LiveCD method requires no installation in Windows, making it a safe alternative to many other password recovery tools.
No Windows passwords need to be known to use the Ophcrack LiveCD to reset Windows password.