That should tell you about how difficult it is to administer windows and something about how much it costs compared to linux.
IME linux systems are installed by enthusiasts working with windows systems. They then administer it for a while, get bored, leave (1) and then the organisation is left looking for someone to administer the system who can understand all the scripts, etc. the last guy has written but not documented. Then they are in real trouble as they can't afford to pay a premium so the whole thing just degenerates into a mess when they don't employ someone suitable.
With windows, they get their course notes out and do what they were trained to do.
1: I know this happens because I put in Unix systems and wrote the scripts and then went on to do something else and I was getting calls months later even though I did document the scripts. It wasn't until they got a new admin guy that could also write scripts that they did their own changes to suit their new practices that the calls stopped.