Bypass Windows Logon Password

April 23rd, 2009 by Dev Team in Privilege Escalation, windows

Accessing a Windows computer without knowing the password is fairly simple with this free tool called Kon-Boot .There are alternatives like Ophcrack etc, but those rely on grabbing the SAM hashes and cracking those. What sets Kon-Boot apart is that is modifies the kernel on-the-fly while booting (everything is done virtually – without any interferences with physical system changes) and allows you to log into any account without entering a password. All you have to do is insert a boot (cd or floppy) disk burned with Kon-boot software(110kb) in to the computer and boot up.

Kon-boot which was initially started as a small project for Linux (mainly Ubuntu),where it allows to log into a Linux system as β€˜root’ user without typing the correct password or to elevate privileges from current user to root. Now it was moved to windows platform where it enables Windows users to login to any password protected machine profile without any knowledge of the password.
This program works with the following versions of Windows: XP (SP1, SP2, SP3), Vista (Business, Ultimate), 2000, Server 2003 and 2008, and Windows 7. Kon-Boot also allows you to boot Linux (distributions: Ubuntu, Gentoo, Debian and Fedora) without a password as well.

10 Responses to ' Bypass Windows Logon Password '

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  1. oneshot417 said,

    on April 30th, 2009 at 12:47 pm


  2. Junkie said,

    on May 5th, 2009 at 4:09 am

    is it something with cd image or what? downloaded 2 times, burned on different cds, it`s not booting from them. saying “Err” while booting, can any1 say what`s worng?

  3. CQR said,

    on May 5th, 2009 at 8:56 am

    Hey guys, can any1 provide md5sum for cd image? coz downloaded 2 times, burned 2 times on different cds, not working..says “Err” while booting..

  4. duddu said,

    on May 19th, 2009 at 3:46 am

    it’s work perfect , just burn it with activeiso,boot from cd ..and that’s all

  5. Deedar said,

    on August 3rd, 2009 at 1:53 am

    will be forget my passpword.
    How can use my computer ?

  6. b1ff said,

    on September 24th, 2009 at 1:10 am

    Wow, amazing πŸ™‚

  7. happykaka said,

    on September 29th, 2009 at 10:52 pm there is an article about how to reset windows password. It must be helpful for those who have been locked out of computer

  8. mknox said,

    on February 20th, 2010 at 10:01 pm

    i thought this would be a virus but then i tried it and

    OMFG!!!!!!!! IT WORKS ;)!!!!


  9. deathgleaner said,

    on March 6th, 2010 at 10:48 pm

    Did nothing but give me a black screen and make the fans on my laptop run crazy

  10. Neon said,

    on December 11th, 2010 at 7:30 am

    deathgleaner, same problem here at first.. but.. if you wait for.. say.. 20-25 minutes you can see a logo across the screen.. but it is very very dark so you will have to look close..

    So in short, did not work for me until i bought the newest version.. and voila.. works like a charm right away! πŸ™‚

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