Xps 15z l511z cannot have any os downloaded on it

I have a dell xps 15z, it's pretty roughed up but it works, a while ago the hard drive on it died, so I got another drive to replace it, I made a windows 10 installer on a usb and connected it to my laptop, then I pressed f12 and it showed the usb, I pressed it and the pc told me no operation system found, wierd but ok, I went back and tried using rufus, same message, messed about with rufus settings but still nothing worked, I tried windows 7 since that was the os shipped with it, no progress, I searched about and saw that it could be a bios issue, so I tried upgrading it and downgrading, but here comes the 2nd issue, I couldn't update the bios because the laptop needs the usb to be bootable so I couldn't just put the bios file in the usb and then update, so I used a method I saw on the Internet that used dddb, but the pc kept telling me the file couldn't be used in dos mode, I also used freedos but I got the same message, despite the dell website saying the file could be used in both windows and dos, anyone has anything or is the pc unrecoverable?

For extra info, the current bios is a09 Phoenix SecureCore Tiano, I tried downgrading to a06 and upgrading to a12 and the issues presented came