TobirOS is really powerfull system that is build on Microsoft's Windows 10 Pro.
It have reduced size of iso file and the system - system needs about 15GBs of storage.
Installation is simple, just download ISO from one of our mirrors, burn it on USB stick with tool like Rufus. The windows installation program will appear normally, you just select drive - and that's it! Installation beggins.
Installer tries it's best to install firefox - but you need internet access - that'll be fixed in the next generation 10.0.2.
You can download version 10.0.1 here: https://mirror1.tobir.xyz/download/TobirOS-10.0.1.iso (Czech language supported only at the moment)
You can check some of the post-install scripts here: https://github.com/tobiasrepracek/TobirOS-Files (They're not all up-to-date)