Quote Originally Posted by askme View Post
Hi all,

I forgot my Windows XP administrator password. I boot the computer with Knoppix 4.0 bootable cd and try to delete C:\windows\system32\config\SAM file which store password (as far as I know) But I cannot delete this file. It say it is read only file, cannot be modified, even though I set mount as read write in action to my windows hard drive. I can remember about six month before, I did same and it worked, but now it is not working.
Can some one let me know how to reset/recover Admin password using knoppix CD.
I also used Knoppix STD with built in Windows password crack tool but it is also not reseting the admin password.
This thread is already very old, from 2005 to 2017, a number of Windows password reset methods or tools were developed , like the Ophcrack, NT password reset tool .