I replaced the hard drive

[CIGARKILLER]

I replaced the hard drive then proceeded to power up the Laptop,

a message said

Boot device not found

Please install an operating system on your hard disk

Hard disk (3FO)

F2 System Diagnostics

For more information, please visit: www.hp.com/go/techcenter/startup

F2 not responding

So I started laptop along with tapping the (esc) Key attempting to open Start up menu,

startup menu opened with the following options

F1 - System Information - key responds, providing system information

F2 - System Diagnostics - key responds, providing Memory test & Hard Drive checks - I ran both and both passed

F9 - Boot Device Options (key non responsive)

F10 - Bios Setup (key non responsive)

F11 - System Recovery (key non responsive)

ENTER - Continue Startup

For more information, please visit: www.hp.com/go/techcenter/startup

whats my next step towards normal startup

[Huffer]

The hard drive, if it is new, is blank. You need software to put on it. Do you have an HP recovery disk or other backup of your old data? 

[CIGARKILLER]

no recovery disk or other backup, How can i get one

[Huffer · Accepted solution]

Did you ever have Windows 10 on it and activated? If so you can download a free Windows 10 install disk from Microsoft. Otherwise you will have to get recovery media from HP for Windows 8 or 8.1. 

Gonna need the Model Number. Envy 4-121 is not complete. Something like Envy 4-1215dx would be the Model Number. 

[CIGARKILLER]

Thank you for you help

i will get recovery media from HP for Windows 8

HP Envy Laptop
Model #: 4-1215dx
Serial #: (removed content)
REV #: 1894-120
PCID #: 088E120000305900000320100
Product #: D1A99UA#ABA