Boot device not found please install an operating system on your hard disk 3fo

[Essence3000]

I tried to reset my laptop and it failed. So after i tried to continue to windows 10 then it entered bootloop. I tried to fix it on my own with command prompt but i made it worse. I watched a youtube vid and i think i may have emptied my disk 0 by accident. Because my windows had a problem updating i tried to update it through command prompt 😭. Im giessing the reason why the boot loop happened was because of my failed windows update. I need help asap. When i turn my lap top on now, its say," boot device not found please install an operating system on your hard disk 3F0 .   F2 sytem diagnostics for more info please visit www.hp.com/go/teachcenter/startup". I tried legacy support but after the window restarts it says enter code then the screen says operating system wasn't found.

[WAWood]

@Essence3000 

First off, you almost certainly NOT running Windows IOT -- so providing us bad information does not help us solve your problems.

Second, Every time I read one of these Factory-Reset-Failed posts I cringe and continue to wonder why everyone seems to think a factory reset is a miracle cure when, in many cases, it only serves to make things worse!

If a factory rest starts out OK and then halts part way through, that is nearly always an indication of a failing drive -- which is a hardware issue that a factory reset will do nothing to fix.

To check for hard drive failing, if your PC is new enough to support UEFI, you can use these steps to test the hard drive: http://support.hp.com/us-en/document/c00439024

If not, you have to follow these steps:
1) Press Esc key repeatedly, several times a second, while rebooting the laptop. Do NOT hold the key down, just press it over and over.
2) Eventually, you will see an HP Startup Menu
3) press the Function key for testing the hard drive (usually F2) and let it run.