If you forgot your windows 7 password and not interested in reinstalling Windows 7, try this method to break that password. Just remember to do this at your own risk.

 

Steps

 

How to Crack Windows Passwords With Ophcrack and Rainbow Tables

Cracking a Windows Password with Ophcrack with the use of rainbow tables, relatively easy if you take the right steps and if the computer can boot from a disc. The free, open source Ophcrack Live CD is a Windows account password cracking tool designed to help you recover lost Windows passwords. Whether you need to recover the lost password to a Windows account, you're looking to ensure that your passwords are secure, or you're a super l33t h4x0r, the Ophcrack Live CD is a pretty useful tool. The Ophcrack Project has recently released a Linux Live-CD based on SLAX that can be used to retrieve and crack passwords from Windows machines with little or no effort.

Edit Steps

1. 
   1
   Go to The Ophcrack Website and download the ophcracklivecd iso that is offered there (~455 MB).
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2. 
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   Burn the iso file to CD using an image burning software.
3. 
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   Put the CD in the disc drive of the computer you want to crack the passwords of.
4. 
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   Boot from disc. This shouldn't be to hard. Depending on computer, enter the bios settings and change the boot settings to boot from a disc drive on first boot device.
5. 
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   Exit BIOS setting.
6. 
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   Ophcrack will initiate by itself.
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   The logo screen should appear, at which you should hit enter. Text should scroll down the screen, and eventually you will have a graphical interface pop up, with the one and only window (Ophcrack).
8. 
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   Once the system is done, select the user account you wish to recover the password for, and click launch.
9. 
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   Depending on the speed of your system, the cracker will go to work, and if it can determine and decrypt your password, it will eventually display it in the "NTPassword" column

       News original from article on Oct, 10, Bill Gates whacked out a cool $100,000 for a Londoner who figured out how to hack into Windows 8. "Congratulations and well done," wrote Microsoft senior security strategist Katie Moussoris in a public blog to James Forshaw, a computer vulnerability researcher

HACK WINDOWS 8

Write the first paragraph of your page fghere.


As it happens, Microsoft has been offering rewards to those able to find security holes in its key systems for around four months.
The idea is to get bounty-chasing tech experts to expose any flaws before malicious hackers do so.
Microsoft has previously paid out $28,000 to users who found holes in Internet Explorer 11. There are still numerous prizes up for grabs.
"The reason we pay so much more for a new attack technique versus for an individual bug is that learning about new mitigation bypass techniques helps us develop defenses against entire classes of attack," Moussoris explained in the blog.
"This knowledge helps us make individual vulnerabilities less useful when attackers try to use them against customers." When we strengthen the platform-wide mitigation, we make it harder to exploit bugs in all software that runs on our platform, not just Microsoft applications.”
Paying out to the Londoner who hacked Windows 8 is really generous! While, during our usual usage of Windows OS, we users often set account (admin included) on our computer for security. It is pity that we often forgot such account password and can’t login laptop based on Windows 8. Then how to hack Windows 8 password?
There are many ways we can have a try. Such as:
Solution 1, hack Windows 8 password by re-installation or factory restore. This will make data lost.
Solution 2, hack Windows 8 login password from safe mode. If we have other administrator account to login computer, this method will be convenient!
Solution 3, hack Windows 8 password with a password reset disk. It will be prompted when can’t login pc with incorrect password. Also, please note that the disk can only be used if we created it before password forgotten.
Solution 4, well, we also can hack Windows 8 password by creating a password reset disk after password lost. At this time, we have to refer to pro Windows 8 Password Hacker Tool. Follow steps below to hack Windows 8 admin password:
Step 1, Download Windows 8 Password Hacker and install it on an available pc.
Step 2, Run the tool, insert a blank CD/DVD/USB into the accessible computer’s port. Create a Windows 8 password reset disk by following the tool prompts.
Step 3, Set BIOS for locked Windows 8 computer. Then insert the created password reset disk into the locked pc and start pc from disk chosen to reset or remove Windows 8 user account password.
Step 4, Restart Win 8 computer and login with password reset.
So, it is not hard to hack Windows 8 login password with pro Windows 8 Password Hacker. Learn more about this tool, you may need it one day if lose login password on Windows 8/7/Vista/XP!

 Lightbulb Kon-boot (Password Utility) Free Version

Also see

HOW TO HACK WINDOWS PASSWORD USING KON BOOT

    Introduction:
  
Kon-Boot enables you logging in to any password protected machine profile without any knowledge        of the password.
    This tool changes the contents of Windows kernel while booting, everything is done virtually -
    without any interferences with physical system changes.
    This was designed to work on X86-32 architectures only.

    HowToUse:
    Burn the iso, boot from CD, after Windows loaded, just give it a right-click on user profile.

    Notes:
    I AM NOT GUARANTEE THIS TOOL 100% WORKS, AND IT MAY GIVES YOU BSOD        (NOTEPAD PARTICULARLY BUGS).
    IF YOUR ANTIVIRUS SCREAMS ABOUT IT, THAT IS A FALSE POSITIVE, NVM.
    THIS SOFTWARE IS ONLY FOR LEGAL AND PERSONAL USE.
    adapted from here.

    Tips:
    You can extract konboot.img from the iso and write it onto your own floppy disk (if you have one).