Install genuine win7 prompt 0XC004F061 error how to do

Some people will appear 0XC004F061 error when installing win7 genuine system. Don't doubt that your serial number is wrong at this time, because your serial number is the upgraded serial number and not the installed serial number. Of course, the serial number of the upgrade is not unusable. You only have to install it in the inactive version before you upgrade.
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We do not need to install the serial number first,
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After installation, we must rush to upgrade, to modify the configuration of the registry.
Enter the registry, locate the MediaBootInstall key under HKEY_LOCAL_MACHINE/Software/Microsoft/Windows/CurrentVersion /Setup/OOBE/address from 1 to 0, modify the registry to restart to take effect, or restart the program explorer.exe.
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Enter CMD in the run, enter the command prompt, then type slmgr /rearm
press Enter. After waiting for the confirmation box to appear, press OK
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and restart. After restarting, re-enter the serial number to activate.