i use windows since Win 3.1 in 1994 or 1995, i know where i find everything on the system, i know what might be wrong when something strange happens, i even did support for Windows for a while and build networks.
all the programs i need run on Windows - like video editing and encoding, dreamweaver, photoshop, outlook
i got two Win 2003 server here that run without any hassle since 2 years now - just a reboot from time to time after updating. and we have about 7 or 8 Win XP clients
of course i tried Linux from time to time - but everythings that's just an easy doubleclick away on Windows (like installing programs, drivers, new drives etc.) requires hours and hours for me on Linux to figure out how it works.
so there's no way i ever switch to Linux as my desktop system - i got no time for learning everything all over again.
