Our work is the opposite. As soon as a new machine arrives we go straight to BIOS at boot, switch the settings and install Linux immediately. Windows never sees the light of day. I do feel for you as we do do sales calls and in the middle of sales calls the people that we are calling have their computers reboot on them, do an update, or I've just got to restart and on restart it does an update and huge amounts of time are wasted on those people.
Windows probably costs the world millions a day in wasted, for time for shit like that.