I need to do a clean install do I need the original operating system install disk

[Virgieaw]

My computer came with windows 8.1 but upgraded to windows 10 now I cant do nothing with it n it says no boot device found and no operating system so I got a windows to recovery disk but it didnt work either what do I do now?

[Lil_Boy_Blue]

Hi
First:- Turn off the computer, press and hold the PWR button for 4 seconds.

Then - Leave only keyboard and mouse connected, disconnect all externally connected
devices such as Docking Station, USB storage devices, displays, and printers.
Unplug the AC adapter from the computer.

Next - Press and Hold the Power button for 15 seconds to Hard Reset.
Rinse and Repeat; Re-Connect the AC adapter.

NOW begin checking/testing/proving the Hardware is fit for purpose.
Power on your PC, press ESC (repeatedly), then F2 at the prompt.
Choose System Tests (Fast Test does a 4 minute hardware check).

Then......

https://www.microsoft.com/en-us/software-download/windows8iso

https://www.microsoft.com/en-us/software-download/windows10

You may need to replace hardware, like the HDD, and re-install.

If in doubt please ask.