Moving from Windows 8.1 Pro to CentOS 7.
CentOS 7 Everything requires about 8 GB space.
UNetbootin successfully created the media, but the installation failed.
Win32DiskImager v. 0.9.5 created the media, and this worked.
During installation, check the resolution: if the resolution is not 3840 x 2160 on a capable display, set motherboard settings to default and retry.