Before you figure out how and why to upgrade DirectX, you need to understand why it is needed. The average user almost never sees the external manifestations of this program, at least as long as it is installed correctly. In the event that it was not delivered as it was necessary, everyone will notice it - after all, practically no game will start.
In the old days, when Windows 98 was just announced, Microsoft set a goal to make a personal computer with the installed operating system a universal device capable of performing both work and gaming tasks. To implement this, it was decided to create a special interpreter, a set of commands that allows developers to more conveniently create applications that will work with graphics faster and better, as well as more productively. That is how this program came into being, then DirectX could be updated using the installers located on the disks.
Each developer attached a copy of the installer of this command handler to his game. This was due to the fact that in those days, not everyone had the Internet, and those who could go online would hardly have been pleased with the need to download several tens of megabytes from there - a crazy amount at that time.
DirectX could be updated immediately after installing the game. For this, a special installer appeared, conducting everything in automatic mode.
With the development of the gaming industry, this interpreter has also improved. Gradually, he acquired new features that made the graphics better. The first, then still timid and not always accurate, three-dimensional image appeared, which replaced the era of isometry. The more functions there were in the program, the more space was occupied by the installer, which allowed updating DirectX. It was necessary to do something with this, since spending precious megabytes was an inadmissible luxury.
Already at sunset time, the ninth version of this program began to appear special installers that downloaded all the data from the Internet. There were two steps to updating DirectX 9. First, a special installer was downloaded, which checked all the necessary libraries and showed the user a solution - is there a need to update something or is everything in perfect condition. If the files were obsolete, then the program connected to one of the mirrors leading to the file and began to load the necessary information from there. Given the high connection speeds, this took no more than ten to fifteen minutes.
Nowadays, when high-speed Internet has become a reality in every home, you can upgrade DirectX 11 in just a few minutes. And this, given the fact that it weighs several times more than the previous version. This is due to increased functionality. The steps taken to install it are similar to those described in the last paragraph - you need to go to the Microsoft website or install some modern game, and the special installer will update all the necessary libraries. With the help of such an installer it is impossible to put the program incorrectly, therefore it will work like a clock.