How to delete a DLL file

Q: Recently read an article, began their own hands-on system "weight loss" plan, but some folders have no file, but can not delete, and some suffixes of the file can also delete the. dll is not deleted, the use of WordPad opened after found that there is no content, but it is not deleted, I would like to ask these files and folders can be deleted?

A: In Windows, many applications are not a complete executable file, they are split into relatively independent dynamic link libraries, which are DLL files, placed in the system. When we execute a program, the corresponding DLL file is invoked. An application can have multiple DLL files, and a DLL file may be shared by several applications, such that a DLL file is called a shared DLL file. DLL files are generally stored in the C:\Windows\System directory. You cannot delete a folder if it is empty. If deleted, there is a problem with operating system operation.