Booting issue

Hello everyone, i have a really bad problem with my hp laptop. This is not easy to explain but i will at least try.
First of all, the laptop is very old and only had windows 10 installed in legacy bios mode. I needed Ubuntu so i decided to dual boot the two operating systems.
The problem is that Ubuntu has been installed in uefi mode so grub wasn't able to detect windows at all. moreover, i am not able to access my windows 10 even if i switch back to legacy mode and i don't know why. so i tried one last thing (and i assume that i should not have done that) which is to use boot-repair in a live USB to try to make up things. But the PC wasn't plugged in so obviously it ran out of power and the boot-repair process got interrupted. Now Things are worse because when i trying using live image tools to repair the disk or even reinstall windows or Linux, my hard drive isn't detected at all. something must have been corrupted due to the interruption and now I'm not even able to install a new operating system.
Actually i don't even care about my personal data, i just want to wipe everything and install a whole new windows 10 then dual booting it with Ubuntu properly.
i apologize for my bad english. i only have an academic level and i don't know if i have managed to explain things well but hope that you will understand anyway.
Thanks in advance for your help.

Yes and it was telling me that OS-prober (or something like that) didn't detect any operating system.
I have a 256gb hard drive. i have always dual booted these two operating systems on countless laptops successfully so i don't know what is actually the problem with this one.
okay thanks i will try installing windows 10 first then i will reply here if i get any issue.

i have some problem installing windows 10 because first of all it told me that my disk must use GPT and not MBR so i used Hiren's boot partition utilities to make the conversion and now it is saying me whenever i try to install windows again that some error has occured or "we were unable to format the disk 0...". alas something like that. not only this pc has no Os but now it is even impossible to have one. let alone dualbooting it

This is specifically where i have a problem. once here I'm unable to delete a single partition :

and when i try to delete :

so i'm obliged to use some third party live images which contains partition tools in order to wipe all partitions and then try to install it.
So after the use of these tools i had just one item shown which was like "Drive 0 - unallocated space(298GB)" then i pressed "next".
During the installation, another error occured :

Then this occurred :

I'm out of options now.

the clean command isn't working because it says he can't wipe a disk which contains system installation or something like that. moreover, gparted isn't even able to detect my hard drive. that's why i'm using some softwares like ease us partition master in some live images to try to make up things.