reboot and select proper boot device or insert boot media in selected boot device and press a key

[VEM]

New set of desktop computer.

 

[Aniket25]

go to bios and check you hard drive getting detected in bios or not.

 

[smorizio]

on a new build your main drive is blank. set the pc to boot from cd rom or usb stick and boot from windows 7 or 8 disk and install your os.