Windows offers a direct line of support for their products including free patches and updates for the life of the OS and a toll free number to call when you have an issue. That is on top of the internet community such as TechNet, MSDN and other Windows dedicated groups that offer great support and help fixing issues.
Linux does not have that since it is free. It has a internet community but it also requires more advanced technical skill. Even the most dumbed down user friendly version of Linux, Ubuntu, requires you to kill the X/GUI (or whatever they decide to call it) and use sudo admin commands to install drivers from hardware devs. And if you can't do that, you don't get proper multi monitor support for example and in the process the GUI can be destroyed.
Each has their place but Windows is easier for networks in businesses due to the integration of so much while Linux serves best as a server/firewall.