I am looking to install a manjaro that works on a 2012 windows 8 computer

[maycne.sonahoz]

@taterofwedges

Its saying when I try to flash the iso that it won’t be bootable for gnome without partitions.

I’m not familiar with Etcher, but this sounds like the thumb drive isn’t set up correctly. Can you reformat it?
Alternatively, you could try using another flash installation medium.
Alternatively, this may also interest you: [HowTo] Boot Manjaro ISO directly with GRUB