After the step 15, one needs to select Advanced startup > Restart now > Use a device > USB Hard Drive and then select the partition to delete (backup first if it is necessary). The new Windows 8 will be reinstalled. If you still choose the “Refresh your PC without affecting your files,” the PC may still be unable to find the recovery environment. I saw several users have reported this problem.
After reinstallation of the OS with the USB plugged in, the PC may still be unable to reinstall the Windows 8 by itself because it may display “Some files are missing. Your Windows instillation or recovery media will provide these files.” In order to have the PC running the installation of the Windows 8 without the Windows installation or recovery media, one may need to perform reinstallation again by selection of the factory default setting with the USB plugged in. I did not further test whether the PC can perform the reinstallation of the OS by itself or still needs the USB plugged in after the PC goes back the factory default setting. I try to have the PC can eventrully perform the reinstallation of the Windows 8 without the Windows instillation or recovery media.
