My update to 14267 has been stuck on 32% 'Preparing to install updates' for more than 45minutes. This is the longest it has ever been stuck during any update.
(Grumble, grumble, moan)
Since posting the comment on the update being stuck, a window popped up telling me that I had an incompatible program installed. It was (of course) one of those free programs from a well-known daily free software website. I was given the option to uninstall it and on doing so Windows continued with the update very quickly.
Most of the software on my PC is paid for and all of these remain compatible with Windows 10.