Windows 7 change password of another user without using “Set Password”

Thanks to @Nikolay's link, I was able to solve the problem :

1. Boot into Bios
2. Change the system date to a day before the event
3. Log into Windows
4. Correct the problem

In the user account settings, I had checked Password never expires and User cannot change password. I was sure there would not be problems. I did not know that the computer's Password Policy - Maximum password age overrides the local user's settings in a Workgroup environment.

To change this Policy, type secpol.msc at the command prompt, and set Account Policies - Password Policy - Maximum password age to 0.

One thing you can try is changing your password using the command-line,

1. Search for cmd, right-click and select Run as administrator

2. At the prompt, type

    net user 
   

   and hit enter to make sure you know what your username is.

3. Next, type

    net user %username% 
   

   and replace the variable username with your actual username. Check the password details and see if Password changeable returns Yes.

4. Finally, change your password. Type the following into the command prompt:

    net user %username% <new password>
   

You should see The command completed successfully.

The above should work. If, for any reason it does not, try running a sfc /scannow.

Edit: Response to Alexander Pozdneev I saw you used Ubuntu to fix your problem temporarily. Since you have Ubuntu, can you try these steps?

1. Open Ubuntu's file manager and navigate to the disk Windows is stored on
2. Go to C:\windows\system32 in the ubuntu file manager
3. Rename utilman.exe utilmanreal.exe and then rename cmd.exe utilman.exe
4. Next, rename utilmanreal.exe cmd.exe (so cmd and utilman have been swapped)
5. Reboot into Windows and click Ease of access. When your password doesn't work, try resetting using the same steps as posted originally (steps 2-4). Because it is using the system account, you may have different results.