How can I solve the problem when I enter the serial number during installation of Windows 7?

Recently, some netizens reported that when using the official version of Windows 7 for installation, "error code: 0XC004F061" is displayed after entering the serial number, because the serial number is actually "upgrade serial number ", it can only be used for upgrade rather than for net installation. This problem often occurs for users who upgrade XP to Windows 7. If you see this error, you can solve it in the following ways.
The solution is as follows:

1. skip this step without entering the serial number during installation. The system will prompt you for a 30-day activation period;

2. after entering the system, Open REGEDIT without any upgrade. EXE modify the registry, and change the mediatetinstall key value under the HKEY_LOCAL_MACHINE/Software/Microsoft/Windows/CurrentVersion/Setup/OOBE/address from 1 to 0. Save the modification;

3. Search for cmd in the Start Menu, open it as an administrator, enter slmgr/rearm, press enter, and wait for the confirmation box to appear;

4. Restart;

5. re-enter the serial number. A message indicating successful activation is displayed;

Note that this method is only applicable to the serial number and Installer of Windows 7, which may not be applicable to other cracking methods or modified installation programs.