What is a free operating system in computer?

Debianis a free Unix-like open-source operating system, which stems from the Debian Project launched in 1993 by Ian Murdock. It is one of the first operating systems based on the Linux and FreeBSD kernel. The stable version 1.1, released in June 1996, is known as the most popular edition for PCs and network servers.

Is there a free Windows operating system?

Nothing’s cheaper than free. If you’re looking for Windows 10 Home, or even Windows 10 Pro, it’s possible to get Windows 10 for free onto your PC if you have Windows 7, which has reached EoL, or later. … If you already have a Windows 7, 8 or 8.1 a software/product key, you can upgrade to Windows 10 for free.