DLL Extension

The document extension DLL is often known as "Dynamic Link Library" and is a widely used extension by most Microsoft-based applications. The extension was created by Microsoft to take advantage of it as a multipurpose application, and to run applications using a set of processes. The DLL extension is also responsible to function as a common library, and also to be a platform for numerous documents and also to help share its platform for executing a variety of applications.

Windows operating system comes with DLL extension. It turned into a crucial system structure, and it helps perform various functions of files. For this reason, you shouldn't tamper with DLL extension. Never attempt to start or edit it. In case it gets deleted in the machine, it is going to spoil the functioning of this operating system, and put a stall in your working.
Since DLL extension is created by Microsoft; therefore, it may be opened just by Windows operating system, and not by other operating systems. This expansion helps run Microsoft Visual Studio 2010, and also Microsoft FoxPro variant 9. Additionally, it runs a program called resource programmer on Windows operating system.

The file extension UNKNOWN has no fixed nature. Where DLL extension is produced by Microsoft, there is no static founder for UNKNOWN format. It is normally considered dangerous, and therefore not downloaded or opened.

Some UNKNOWN files are hard to open, and when this happens you ought to set up a particular software compatible for that extension and application where you were used to open it.