Windows 7 Issues Booting Windows 7 After SID Change and Missing Administrator Account

It sounds like your Windows 7 system is experiencing issues after your little brother messed around with the New SID number. The disappearance of the Administrator account and the inability to create a new one, along with the prompt asking for a password when running anything but not providing an input field to type in, are signs of a potentially serious problem. To address this issue, you can try to reset the Administrator password using a bootable USB drive with a password reset tool. Here are the general steps you can follow to reset the Windows 7 Administrator password using a bootable USB drive: 1. Create a Bootable USB Drive: - Use another computer to create a bootable USB drive with a password reset tool. There are various tools available for this purpose, such as "Offline NT Password & Registry Editor" or "PCUnlocker." 2. Boot from the USB Drive: - Insert the bootable USB drive into the affected computer. - Boot your computer from the USB drive. You may need to access the BIOS settings during startup to change the boot order to boot from the USB drive. 3. Reset the Administrator Password: - Follow the on-screen instructions provided by the password reset tool to reset the Administrator password. 4. Reboot Your Computer: - After resetting the Administrator password, remove the USB drive and restart your computer normally. This process should allow you to regain access to the Administrator account on your Windows 7 system. Remember to create a backup of important files before proceeding with any changes. If you encounter any difficulties during this process, feel free to ask for further assistance.