Installing windows 7 on mac mini?

Question

Windows

Hello .
Help please
I got a mac mini with Windows installed (3 pieces A1283 with Windows XP and 1 piece with Windows 8). I wanted to reinstall, but it turned out there is no bios in poppy beeches. In Google, I did not find instructions on how to reinstall with MAC OS installed using bootcamp, how to install Windows already with Windows installed. Is it possible to install Windows 7 on a Mac mini?
Thanks in advance

Answer 1

Make a bootable flash drive with win7. And when you start the poppy, choose to boot from it.
Continue as usual

Answer 2

https://support.apple.com/en-us/HT201468