do i need to replace my son's hdd and how do i get the operating system installed on the new one?

[cR0d]

my wife accidently knocked my son's computer off of it's stand and now it gives a "boot device not found" error.  I troubleshot by holding f11 on start up ad ran the hard drive test and the results were: testing drive-1/ smart check- passed/ Long DST- warning.  i figured this means that i need to replace his hard drive.  if so, i'm planning to upgrade it to a 1 tb ssd.  thoughts?

[Prométhée]

Hello
the hard drive is defective
It can continue to operate for a certain time, but it can definitively break down, if it is not already the case!
If possible, save personal data
Try a full reinstall
Be careful even if it works, it may permanently break down, save the data regularly.
This may allow you to use the computer while you find a hard drive!
Your computer should be this

870-224 Product Specifications

You can try to help yourself with this tutorial (sorry not fully translated)

que faire en cas d' erreur / échec dst du disque dur - HP Support Community - 7338574

Using the HP Cloud Recovery Tool (Windows 10, 7)

• Creating and Using a Microsoft Recovery USB Drive (Windows 10)

•  Performing an HP System Recovery

 if the original hard drive is usable
 you can try using cloning software to copy all of its contents to the new SSD

But he risks copying errors
Otherwise, you can also try an installation from iso microsoft:

https://www.microsoft.com/fr-fr/software-download/windows10

[cR0d]

thank you for responding.  and you're right, i think it has already broken down.  every time we try to start his computer, all we get is the "no boot device found" error.  I just wanted someone else's opinion on it also before i ordered the new ssd.  thanks again

[Prométhée]

it is annoying, I just saw the answer by chance, I did not receive the notification, as it is done normally.
If my answer suits you, therefore, please mark it, in order to finalize the subject