This pertains to a new Windows 8 installation, but you purchased a Windows 8 upgrade license key.

From an administrator level account in your new Windows 8 installation bring up regedit from an administrative level command prompt.

Navigate to


Modify the MediabootInstall key.

If the value is a 1, change it to a 0.

Back to the elevated command prompt, enter

slmgr /rearm

Then, reboot.

shutdown /r /y /t 0