Windows password cracker
Ophcrack is a Windows password cracker based on a time-memory trade-off using rainbow tables. This is a new variant of Hellman’s original trade-off, with better performance. It recovers 99.9% of alphanumeric passwords in seconds.” <- taken from sourceforge.
What do you need:
1. Physical contact with the computer.
2. CD with Ophcrack on it.
3. The computer must be able to boot from CD(which shouldn’t be a problem).
(you don’t need limited user access or anything else)
How to use:
(First download the image file from the provided link, and burn it to a CD.)
After you have the Ophcrack Live CD:
1. Make the computer you wanna crack in to boot from CD. For those who don’t know how, just enter into the BIOS and search for a boot priority, just change the sequence to boot from CD first, save changes and exit.(if you don’t know how to access the BIOS search google for it, also google may help with the boot priority).
2. Enter the CD and reboot. It will boot up to linux, and you’ll be able to handle it from there. It might ask you ‘which partition’ you wanna scan, and everything else will be done by itself. It will find the password for every user on that disc partition.
3. Have fun!;)
Download
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here is the methods I know.
The first thing which you check if you forget login password. When we install Windows, it automatically creates an account “Administrator” and sets its password to blank. So if you have forget Your user account password then try this:
Start system and when you See Windows Welcome screen / Login screen, press ctrl+alt+del keys Twice and it’ll show Classic Login box. Now type “Administrator” (without quotes) in Username and leave Password field blank. Now press Enter and you should be able to log in Windows.
Now you can reset your account password from “Control Panel -> User Accounts”.
Same thing can be done using Safe Mode. In Safe Mode Windows will show this in-built Administrator account in Login screen.
Windows XP and further versions also provide another method to recover forgotten Password by using “Reset Disk”. If you created a Password Reset Disk in Past, you can use that disk to reset the password.