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Help with DLL

Frequently asked Questions

  1. Open the zip file downloaded from
  2. Extract the DLL file into any location on the computer. After that, we recommend that you should place the file into the folder of the program that requests the file. Make sure that you are using the 32-bit format of the DLL file for the 32-bit program, and the 64-bit format of the DLL file for the 64-bit program, otherwise you may have the 0xc000007b error.
  3. If the actions described above don’t solve the problem, place the file into the system folder. By default, this folder is located here:
    1. C:\Windows\System (Windows 95/98/Me);
    2. C:\WINNT\System32 (Windows NT/2000);
    3. or C:\Windows\System32 (Windows XP, Vista, 7, 8, 8.1, 10).
  4. In the 64-bit version of Windows, the folder for 32-bit DLL files is located here by default: C:\Windows\SysWOW64\ , and for 64-bit DLL files: C:\Windows\System32\ .

Be sure to rewrite all the existing files (but keep a backup copy of the original file). Restart the computer. If this hasn’t solved the problem, try doing the following to write the file into the registry:

For 32-bit DLL files in 32-bit versions of Windows, and for 64-bit DLL files in 64-bit versions of Windows:

  1. Open the command line in an elevated mode. To do this, click Start, All Programs, select Accessories, right-click on Command Line, then click Run as Administrator. If you are prompted to enter the administrator’s password or to confirm, enter the password or click Enable.
  2. After that, type regsvr32 "filename".dll and press Enter.

Writing 32-bit DLL files into the registry in the 64-bit version of Windows:

  1. Open the command line in an elevated mode, having performed the actions described above.
  2. Type the following: cd c:\windows\syswow64\. Press Enter.
  3. Type regsvr32 c:\windows\syswow64\"filename".dll and press Enter.

A dynamic-link library, or DLL, is a concept of the Microsoft Windows operating system, a dynamic library allowing for its multiple usage by different software applications, is a concept of the Microsoft Windows operating system. ActiveX controls and drivers belong to DLLs as well.

The DLL file format follows the same conventions as the format of executable EXE files, it combines codes, tables and resources.

The goals of DLL implementation

Initially, it was assumed that the implementation of DLLs would allow for efficiently organizing the memory and the disk space, using only one instance of library modules for multiple applications. It was especially important for earlier versions of Microsoft Windows with strict memory limitations Then, it was contemplated to enhance the efficiency of development and usage of system facilities by means of modularity.

Replacing one version of DLL programs with another had to allow for building up the system independently without affecting the applications. In addition to that, DLL libraries could be used by different types of applications, such as Microsoft Office, Microsoft Visual Studio, etc. At a later stage, the idea of modularity developed into the concept of ActiveX controls. In fact, it was not possible to get full advantages of DLL implementation due to the phenomenon called DLL hell (or DLL nightmare).

DLL hell arises when several applications require different versions of DLL libraries at the same time due to their incomplete compatibility, which leads to serious conflicts. After the system grew to a certain size, the number of DLLs exceeded many thousands, not all of them were fully reliable and compatible, and conflicts like DLL hell started arising very often, sharply decreasing the overall reliability of the system.

The later versions of Microsoft Windows allow parallel use of different DLL versions, which reduces the initial modularity principle’s advantages to zero.

DLL files are dynamic libraries used by numerous programs on your PC. At a moment when one of the programs on the PC is deleted or updated, it may happen that the DLL files previously installed in the operating system get deleted by mistake. Besides such a situation, the system very often cannot find a DLL because of viruses or unlicensed software, which certainly leave a negative trace of their presence on the computer.

Very often DLL files are lost because of broken links between the program and the operating system in those cases when the user moves the program manually from one folder to another. Only the automated and system tools for software deletion and installation on the PC can ensure the most comfortable use of the computer and the operating system.

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