Well it comes on most computers pre-installed and it is therefore difficult NOT to to get it (and pay for it). However, there are much better FREE to use operating systems that could be used instead....
Marketing, broad platform and hardware support, extensive software libraries. Microsoft began their dominance with DOS on IBM and compatible PCs, and the first versions of Windows ran under DOS. With...
Read your EULA. The license encourages you, and only you, to use the PC, even if you install sshd or vnc so others can use it. Now ask yourself if Debian Linux is a multiuser operating system.