There are a lot of reasons why you might want to immediately reset or change the password to your Windows account. There are multiple ways to do that but it all depends on how exactly you are trying to access your account. If you are locked out of your account you might need to use a third party utility in order to access that information. Otherwise you can do it through the command line.
Using the command line
Using the command line to change the passwords is incredibly easy. Simply issue the following command: net user username newpass
Change the “username” and “newpass” to fit your own. This will automatically reset your password and change it to the one you enter in place of “newpass”. You can even issue a remote command using this: net user username * /domain. Obviously change again to suit your own.
Using extra tools
Now, if you are locked completely out of Windows, you will need an extra tool to do the job. I have seen people actually reinstall their systems because they thought there was no way to recover the passwords. This could not be further from the truth. Free tools like Trinity Rescue Kit will do the job just fine. Even though this tool might not have a pretty graphical interface, it is extremely powerful and will definitely give you access to your account. You can even choose to reset or change your password on the spot.