Dunno what you use that desktop for, but it should be more than adequate to handle Win10 since newer Atom processors and old Core 2 Duo laptops can run Win10 mostly issue free.

You can install Win10 (better 64bit version, since you have 8GB RAM) from ISO and don't activate it, a nag message at bottom right of screen.

This post has been edited by weissPC: Jul 18 2019, 02:06 AM

The SSD is m2 type? Sometimes, it's better to unplug/remove the ssd to make sure that it's not causing the PC not able to boot up due to bios no detect.

Try to remove extra peripheral devices and just have the basic PC to test whether you can boot/install OS.

It helps in troubleshooting by reducing the number of possible causes.

Good luck!