If you have forgotten the password of your Windows and you want to re-install, then there is probably no solution to install it without knowing the password. The best way is to crack the password of Windows but cracking a password is very hard job to do and it even requires in-depth knowledge of lots of applications.
But if you don’t want to spend hours or probably days in cracking the password, then you can simply use a tool named OphCrack which can simply crack the password of your windows and that to within a very short span of time. This tool is absolutely free to use and it is the best tool to crack Window’s password. The basic working of this tool depends on rainbow tables which it downloads itself at the time of installation.
This is the main window of this utility. As I have already told this tool uses very efficient implementation of rainbow tables and it is done by inventors of the method. The best part is that it comes with a simple Graphical Interface and hence anyone with a little knowledge about computer can crack the passwords with the help of this tool.
This tool even runs on Multiplatform i.e it runs on Windows, Linux/Unix, Mac OS X. It works pretty fast and it is easy to use even if you have basic Windows skills. Now to use this tool, first you will need to download it from the developer’s website whose link is given at the end of my article. You will see a web page as follows.
These are the two downloads files which are available on the site. You can use Download OphCrack if your windows is still working and you want to recover passwords just because there is some issues in your Windows. You can download OphCrack Live CD if your Windows is not at all functioning and you need password to install it.
First I will tell in brief about OphCrack. When you run its installation file, you will see the options to download tables in the starting of the installation process.
Here you will need to click on Download and Install tables which ever matches with your Windows version. The it will automatically connect to internet to download these tables. Tables for Windows XP and Vista is free to use but developer has not given tables for Windows 7 for free yet. After it complete installation, it will automatically get installed in your PC.
To crack passwords, click on Load and there you will find various options using which you can crack LM and NTLM hashes.
OphCrack can surely recover 99.9% of passwords from nearly any Windows installation in seconds. You can even run the Brute-force module for simple passwords. There is also Audit mode given and to extract the information, you can simply export as a CSV format file. This tool will provide you a Real-time graphs to analyse the passwords. As you can see above, you can even Load hashes from the encrypted SAM.
For OphCrack Live CD, first you will need to download it from the website. Its size is approx. 490 Mb and it is also free to download. It is basically an ISO image and you can simply burn it by double clicking on this file. This CD contains SliTaz (a Linux distribution), the OphCrack software, and other files needed to recover passwords. Don’t worry about the details because the OphCrack Live CD is fully automatic and no Linux experience is required. You can check this link to read the complete tutorial to use this CD.
The size of OphCrack is 5.40 Mb and as usual it will create a desktop shortcut which can be used to access this freeware. This freeware i compatible for all the versions of Windows, Linux/Unix, Mac OS X and has been tested successfully on Windows 7 Ultimate-32 bit edition.