How to reset Windows 7 password without losing data?

Jonaham My suggestion is to download Windows 7 ISO and make a bootable USB. After that, you can use this bootable disk to reset Windows 7 password using Command Prompt and it is free. However, the trick is a bit complicated as it includes command inputs.

Step 1: Insert the Windows 7 installation or repair disk into your computer and boot from it.

Step 2:  Choose your language preferences and click "Next." After that, click "Repair your computer."

Step 3: Select the operating system to repair and click "Next" to open the Command Prompt utility.

Step 4: In the Command Prompt, type the following commands:

copy c:\windows\system32\utilman.exe c:\
copy c:\windows\system32\cmd.exe c:\windows\system32\utilman.exe

This replaces the Utility Manager (which can be accessed from the login screen) with the Command Prompt.

Step 5:  Remove the installation disk and restart your computer. On the login screen, click the Utility Manager icon (the icon at the bottom left corner). This will open Command Prompt instead.

Step 6: Use the net user command to reset the password as described in the earlier methods.

After resetting the password, it's important to restore the original Utility Manager. 

copy c:\utilman.exe c:\windows\system32\utilman.exe

Restart Windows 7 computer and log in with the new password. This is a working method that allows you to reset Windows 7 login password even if you've forgotten it.