stalebrim How he's gonna install Windows if the laptop is unbootable? It gets stuck on the loading bar with Dell logo, unable to access BIOS or boot menu, or to boot from any media.
If @Rolts can create a Windows installation USB using the Windows Media Creation Tool on a Windows computer, the USB should boot automatically (a Windows-created installation USB forces precedence in the boot sequence on many/most Windows OEM computers, whether or not Windows is currently installed), without intervention using the Boot Menu (as is required for USB installers created by Rufus, Etcher or other methods). I've used this method a number of times to bring bricked computers back to life. I don't guarantee it, but it probably is the best option to unbrick the computer at this point. At least it is the best option that I know.
If that doesn't work, the only other thing that might work is to take the HHD out of the computer, delete all the partitions using another computer, re-initialize the HHD, and then start over.
However, I defer to your knowledge, which is probably superior to mine. If you have a better method, then explain it and @Rolts can try your suggestion. Right now he's bricked, and until he can get past that problem, the computer is useless.
