Windows Vista Administrator lost password

I'm quite savy at computers but this is tricky. My mom has me set on parental controls for Windows Vista. She gave me her password and I turned them out, logged off and then logged back on to my account. Then, when I turned off the computer and she turned it back on the next day, her password didn't work. She's called people and apparently, I changed the password without knowing I did.

Here's the problem, I don't have a disk to reset the administrator password and I already tried the CMD way to reset the password but I got "System Error 5 has occured. Access denied."

The administrator password is a big one since it controls everything I do. I can't change anything or download anything without that password.

Is there ANYWAY I could change it?

Your mother can do a system restore at boot using a restore point dated
before the password was changed to restore the old password. The
tutorial below can help show her how to.

If you havenot NTFS encrypted files on your computer, you can just reset the
administrator password to blank using a Windows Password Reset Disc.

I have used Lazesoft Recover My Password, which is a easy to use. Here is
guides how to use it to reset Windows Administrator password to blank

The easiest one to use is the Offlien NT Registry Editor. This will
clear the password for you so you can sign in and create a new one.
Please use this one, it is trusted and probably one of the more safe
ways to go.

This will download as an .iso file. It will need to be burnt as an
image. So you will need imgburn or other software that will handle .iso
formats.

So you have to download & burn any tool to reset password i.e Offline
NT Registry Editor (*@CrucialHoax* post).Alternative you can try enable
in WinRE build-in Administrator account 'What do I do: I can no longer
log in or elevate to an administrator account'
System Restore (*@Brink* post) is also solution if both methods are too
hard.

Hi, guy. Don't worry, there are many people forget their admin password/ lost admin password, and there is a popular solution for those who have been locked out by computer. For this solution, what you need id a second computer that can link to Internet
With Windows Password Recovery, you can create a reset CD which can be multiple used to reset windows admin password without erasing anything.

If you lost windows password. I think the best solution is making a windows password recovery disk with the third part utility. The disk works perfectly to recover windows password to “Blank”. It is also useful for administrator password recovery, you can wrote it to an blank CD or USB flash drive to.

I know some windows password tools just like below

1. Windows Password Recovery Tool 3.0

2. Windows Password Key 8.0

3. Windows Password Recovery 6.0