If you have a spare floppy disk lying around, pop over to the KolibriOS website and download the image from there. Just be sure your PC can handle the punishing system specs as listed on its wiki ...

While most operating systems are written in C and C++, KolibriOS is written in pure x86 assembly and as a result small and lightweight enough to run off a standard 1.44 MB floppy disk, as demonstra… ...