Ive resently install windows 7 on my hp laptop and also delete all partitions and create new ones it instaled corectely but when i turn on later it was saying boot devise not found , pls install an operating system , press F2 after pressing hard disk test was a pass and other test also passed then i restert it start normaly each time i start it first show me those messages but after restarting it normaly start why this is happening
Laptop model is
HP EliteBook 8460p
Laptop model is
HP EliteBook 8460p