Because Windows Help is included in so many different software packages, users often have their Help system replaced by the install program they are using to install a new software program. This makes it virtually impossible for any single application to know which version of Windows Help users have installed on their system. For that reason, Help authors at Microsoft have decided not to create online tutorial lessons about Windows Help. Therefore, Windows Help 3.1 has removed the “CBT aware” functionality that was required to support tutorials about Help.