DLL (Dynamic-link library) file includes a lot of functions, data and other resources that can be accessed and utilized by multiple programs. In addition, its importance to the system is self-evident (the absence of some important items inside will not only cause some software to fail, but also cause the system to crash), and virus files often use it to disguise themselves.

In the daily usage of Windows, we occasionally meet system or software errors/prompts like: "***.dll file is missing, xxx can't start...", causing us not to be able to run some software, especially a lot of games. In this case, the first thing we think of is often to search the error message and then download, install and register the corresponding missing DLL files, so as to achieve a manual repair. Therefore, this is not a troublesome thing for just a few missing DLL files, but too many, it will make a user feel hard to accept.