While Windows 10 doesn’t allow you to abuse the Administrator account like you could in past renditions of Windows, you can use a Windows 10 installation drive and Command Prompt to add a new administrator-enabled user that can see the main account’s files and folders. Create a Windows 10 installation tool. Open the Windows 10 download page. Follow the on-screen prompts, making sure to use your flash drive as the installation location. Leave the flash drive plugged in after the creation process completes. Find the “Boot Order” section in the Boot or Advanced tab. You should see the Command Prompt window open.
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Replace Utility Manager with Command Prompt. Utility Manager is a service which has an icon available on the lock screen. At this point, you’ll need to remove your installation media from the computer in order to ensure that Windows reboots to the login screen rather than back into the installation setup. Once the lock screen loads, click the “Utility Manager” icon, which resembles a dial with a right-facing arrow in the middle, in the bottom-right corner of the screen. A Command Prompt window will open. If you don’t replace Utility Manager with Command Prompt, clicking this icon will open the Utility Manager instead. Your computer will restart one final time, after which point you’ll be able to log in with your new administrator account.
Log in with your new user. Wait for Windows to finish setting up your new user account. Scroll up and click This PC in the left-hand column. Double-click the main account’s user folder. Click Continue when prompted, then wait for the user’s folders to load. Browse the user’s files and folders as needed.
Keep in mind that the Mac user will know that someone accessed their computer due to the password change. Click Restart at the bottom of the login screen. Restart, and click Restart when prompted. You’ll need to do this immediately after clicking Restart.
Release the keys when you see the Apple logo. This will cause your Mac to start into the recovery menu. It’s at the bottom of the screen. This menu item is at the top of the screen. Clicking it prompts a drop-down menu. Doing so opens a Terminal window. A few Terminal commands will run, and the password reset page will open in the background.
Once you see the password reset page open in the background, click the red circle in the upper-left corner of the Terminal window. Click the name of the user account you want to hack, then click Next at the bottom of the window. Verify password — Re-type the password. Password hint — Add a hint for the password. You’ll find this option at the bottom of the screen. Log in with your new password.