I would probably agree consideration should be given to returning it, in case something like the hard drive is bad.
But since this is an new system, any chance it is installed as a UEFI system? You can tell from a Disk Management if it has a EFI partition, or if you can't get into the OS, running Diskpart to look at the drive configuration, should show a * under GPT. If it were to be UEFI, you would need to boot to the Windows Boot Manager, not the hard drive.
Some Windows Updates may fail, or at least the first time. Not sure why Safe Mode would cause your problem, unless you changed the boot options by starting it.
In the bios, what do you show for possible boot devices/options?