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Fix a DLL error: the complete guide

When you get a system error window telling that a DLL file is missing, the following questions arise: what is its purpose?

DLL files have a fundamental purpose, to reduce code and increase computer performance. A DLL file is a dynamic library that is used by all applications.

Errors may occur on a Windows PC that is associated with DLL files. These errors prevent the user from running his required programs. Error messages begin to show up on the screen, specifying exactly which .DLL file is missing. The problem can be solved by finding the specific file and placing it in the system directory.

Read more about DLL files

DLL files are considered in most usage operations to be the main factor in errors when Windows starts up and runs. A DLL file does not need to be edited because it can cause new problems that will affect many programs with other DLL files.

The codes in a DLL are considered to be shared by the processes that need the DLL (the files are in physical memory).

DLL files in older versions of Windows

Older versions of Windows, where each running process had one extensive task area, required one copy of DLL code.

For example, specific programs from a loaded DLL do not have these addresses in a free base. Then you need to make another copy of the DLL code with a base of a unique set of relocatable input coefficients. If physical memory needs to be restored, the busy partition code is reset along with the contents, and a quick reload from the DLL file is done. Also, GDI loads all the other device drivers, so Windows starts to load the rest of the Windows packages, calling these programs API from USER/GDI.

Because of this, the DLL file carries a lot of utilities at once. With DLL updates to a modern version, the previous version is overwritten or deleted from the PC. ActiveX Controls, Control Panel Recordsdata, and device drivers are the basis of data for Windows as Dynamic Link Libraries.

How to fix DLL errors?

There are several proven ways to deal with DLL problems:

• Run the Windows Resource Protection Tool or SFC.
• Download a missing or corrupted DLL file and place it in the system folder.
• Try updating to the Microsoft Visual C++ Redistributable.
• Try to update Microsoft .NET Framework.
• You may reinstall the problematic application.
• Request a copy of the DLL file from the manufacturer.

Additional information about DLL files

Related executable files can be loaded earlier if you run them in similar settings that they were compiled. Let's add that every standard Windows target has associated DLL files.

A great alternative to binding the import to the target environment is to boot with a utility installation. But such a program changes the check value of the executable. Later versions of Windows no longer have the address of each loaded library, which leads to a much smaller executable.

Many dynamic linking libraries have a .DLL ending in their files, but other libraries use .OCX, .CPL, .DRV. Definition packages, such as UPX compress the DLL, which leads to a problem: the read and write code sections are not separated. These sections resemble non-public partitions because they are private within each process.

As a result, DLLs with public sections must necessarily be uncompressed when multiple packages use them simultaneously. Each instance of the program must have one private copy of the DLL.