If you’ve forgotten the password to a Windows machine, this post may help you. Before you try this, there are other easier methods like logging in as an administrator – But this will rely on you forgetting the password to your user account not the administrator one. These are many good guides for this online, if this sounds suitable, try this first.
If these approaches are no good, you may want to try NTPassword reset, their website: pogostick or download the bootable USB version from the link at the bottom of this post. To use the software you create a bootable CD or USB stick with the software and run it. Instructions are included within the download.
The process may look confusing but when you’re into the software you select options using the numeric keys and the process to reset a users password is fairly simple. A word of warning however – If the user hard drive uses something like Bitlocker or any hard drive encryption, the data will become corrupt. Only use this if the drive is not encrypted.
As far as compatibility goes, the website claims the software .Supports all Windows from NT3.5 to Win7, also 64 bit and also the Server versions (like 2003 and 2008)’.