Ophcrack 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.
When you bought a used computer from eBay and find out there is a password on it, what you should to do? Return it or just simply crack the password? The answer is pretty obvious because there are many password cracking software available. And it would take too much time to send back the machine to the seller. However, password cracking is not that easy as you could image. Microsoft has done a tremendous job to secure a Windows computer. You are free to put a text password, PIN code or picture password as the default security type, which is hard to crack on old machines.
crack windows xp administrator password
In this tutorial, PassMoz Editors round up all the possible ways to crack login password on Windows PCs or laptops. The suggestions work well on Windows 10/8/7 as well as Windows XP/Vista. Each of the methos apply to certain situations so please choose the right according to your own case. Please read the steps carefully and get the password cracked as soon as possible.
Step 4 : Reboot your PC again and login to your computer with the new admin account. Don't worry it won't ask for any password. Right click on "My Computer" and select Manage. Alternately, you can open the RUN box and type "compmgmt.msc" and hit enter to open the Computer Manager Windows. Step 5 : Browse "Local Users and Groups" and you should be able to see all the user profiles linked to your computer. Right click on your main administrator account and select "Set Password". Step 6 : Enter a new password twice for your computer and apply it. Restart your PC and login to your account with the help of the new password.
Ophcrack is an old yet effective Windows password recovery tool that helps to recover forgotten password by running some simulations on your locked computer. It can only recover simple and easy passwords with less than 8 characters only.
In the future, make sure to have multiple administrator accounts on the computer or create a password reset disk for your own PC so that you can change the password is you forgot it. But even if you failed to do that, then PassMoz LabWin is always there to serve you and save you from a huge embarrassing moment. Do let us know if you have more tweaks and tricks to reset Windows computer password in the comments below.
There are two basic approaches to gaining access to the target machine. The first is to find and decrypt the existing account names and passwords on the system. The second is to actually overwrite the administrator password (usually with a blank one). The second approach is more useful if you have corrupted your system somehow so that the administrator password doesn't work any more. Utilizing the second method carries with it a chance that you could destroy your password hashes (meaning no account will be able to access the machine). This fact, combined with the fact that changing the administrator password is quickly noticeable, renders this second approach a last ditch effort for most cases.
Because Windows XP passwords are encrypted in a unique fashion many password crackers utilize rainbow tables to decrypt them. A rainbow table is a huge list of hashes produced by encrypting passwords. XP passwords are stored encrypted, so your password is actually stored as an encrypted string. A rainbow table is basically a huge index of encrypted passwords and their unencrypted version. By taking an encrypted password and comparing it to these tables you can quickly look up what the unencrypted version of the password actually is. This attack method is successful mainly because creating the rainbow tables is time consuming, but looking up an encrypted password is not. Thus, an attacker can create the tables beforehand, taking as much time as they want, and then crack passwords quickly with the lookup. Of course, the larger the range of options (letter, numbers, symbols, etc.) the larger the table.
Ophcrack is a quick and dirty cracking tool for recovering Windows passwords. The program itself uses rainbow tables to recover passwords for accounts on a windows machine. The easiest way to use Ophcrack is actually to download and burn the bootable ISO image. This is sort of like a Knoppix distribution (a bootable linux CD) that automatically fires up Ophcrack and begins work on Windows passwords it finds on the host system. Depending on your system setup Ophcrack can save you a lot of time. I found Ophcrack discovered the administrator password on my XP Pro laptop in less than a minute after the boot process completed. Some accounts may take much more time to crack than others. However, if you need access to a machine and you're willing to wait around while Ophcrack does it work then this might be your best bet. I should also note that Ophcrack is not 100 percent reliable. Although it cracked the administrator account on my machine quite quickly it didn't successfully crack a password for one of the user accounts that utilizes special characters. This is a weakness in the included tables, however, not in Ophcrack itself. Because the live CD only includes alphanumeric rainbow tables it won't be able to crack accounts that have special characters in their passwords.
Resetting the administrator password is a little more complex, but relies on the same sort of tools. The first thing you'll need is another Linux boot CD, specifically Knoppix-STD. This is a single, security oriented boot CD packed with useful tools for diagnostics, testing, and security related purposes. What you'll have to do is boot off the Knoppix CD, mount the Windows drives, then use command line utilities to reset account passwords.
The reason this process isn't so straightforward is that the windows passwords are encrypted using information stored in the SYSTEM file, and the hashes themselves are stored in a SAM file. The password hashes are created using registry data, which is stored in several 'hives.' Once all these pieces are located you can monkey with the user accounts fairly easily.
This is the directory on windows where the SAM and system file are located (usually C:\WINDOWS\system32\config). Now that you're in the proper directory you can change the administrator password using:
At the prompt that asks you if you wish to disable SYSKEY select no, at the prompt to enter a new password simply hit return to set a blank password (this is the safest option). Make sure to confirm the change and write the hive files when prompted. This will reset the administrator password to a blank password so you can reboot and log in as the administrator.
Assuming you actually have access to the machine through another legitimate account cracking the passwords for other system accounts becomes much easier. Programs like SAMInside, John the Ripper, PWDump, MD5Crack. Of course, using one of the above methods you could reset or discover the password to a legitimate account, then use that information to log in and utilize these programs. Using cracking tools from the machine itself presents some advantage, but also some challenge. Anti virus or other security protections loaded on the machine might thwart attempts to load such software or crack the password, and without access to the administrator account it might be impossible to disable these safeguards.
It will be a very frustrating thing if you forget the login password of your computer, today, iSeePassword Windows Password Recovery tool will end such tragedy. The password recovery for Windows tool can be the right key, which can remove lost/forgotten local administrator and users' password for Windows 10, 8, 7, Vista, XP, and Windows Server 2000/2003/2008/2012 quickly and conveniently. Only 3 Steps, you can regain your password.
Many times, forgetting administrator password is a big headache for users, if you don't have reset disk or another admin account, in such situation, the only thing you can do is reformat your hard drive or re-install your windows system, but this would cause the loss of all data or computer crashed, it's not an ideal solution. Whatever the reason, iSeePassword Windows Password Recovery Pro tool can be able to easily reset your password without re-installing the system.
When you forget your Windows administrator password and locked out of Windows, you can't access your computer, but all-in-one Windows password restore software can help you reset and bypass all windows password without re-installing system and losing your data. Whether it is Windows local administrator or other users password, domain admin or other users password, iSeePassword Windows Password Recovery Pro tool will be your best choice to unlock it.
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1. Opchrack can crack passwords for Windows 7, Windows Vista, and Windows XP.2. 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.3. Ophcrack can recover 99% of passwords from Windows 7 or Windows Vista. A dictionary attack is used in Windows 7 and Vista.4. The Ophcrack LiveCD option allows for completely automatic password recovery.5. LiveCD method requires no installation in Windows, making it a safe alternative to many other password recovery tools.6. No Windows passwords need to be known to use the Ophcrack LiveCD to crack your Windows passwords. 2ff7e9595c
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