Unable to register module. Windows Registers files with *.dll and *.ocx extensions. Several ways to register a dynamic library

2. After you have copied the library, press the combination WIN+R and paste into the window that opens:

regsvr32<имя библиотеки>

For example regsvr32 mfc100

And press Enter

If this error appears,

then try pressing the same key combination and inserting the following:

%WINDIR%\SysWOW64\regsvr32<имя библиотеки>

For example %WINDIR%\SysWOW64\regsvr32 mfc100

If the library is correct, then registration will be successful and you will see the following message

P.S. If you need to register a library that is located in a different directory (not the system directory), then you must specify the full path to the library.

For example regsvr32

1. Copy the downloaded library to the desired system directory. (this is either system32 or SysWOW64)*

* Which directory to copy libraries to depends on the bit depth of the application. If you don't know exactly which folder to copy to, copy to both J

2. Download archive at the bottom of the post, unzip, run the reg.bat file with administrator rights, select the bit depth you need, press Enter and insert library name, which you copied to the system directory. Everything should go well and you will see this message.

If you see such a message

Then select a different bit size and try to register again. Everything should go well.

P.S. If you need to register a library that is located in a different directory (not the system directory), then you must specify the full path to the library in the library name.

For example C:\Program Files\1Cv77\BIN\V7PLUS.dll

Model of multi-component objects ( C omponent O bject M odel - COM) is the main means of interaction between programs of any type: libraries, applications, system software, etc. and defines a standard mechanism by which one piece of software (the server) provides its services to another (the client), which is ensured by the use of certain communication protocols between them (between the client and the server). The server can be a dynamic link library (DLL) that is loaded while the application is running, or a separate independent process that can be a component of an application or system program, or even a process running on another computer. To find the server the client needs, special information from the Windows registry is used, which is generated when registration server in the system, most often in the form of a dynamically loaded DLL library module. Registration is necessary because programs do not work with the DLL, OCX, ACX, EXE files themselves, but with objects that represent a specific set of program interfaces. The following registry keys are used to register DLLs:

HKLM\SOFTWARE\Classes\CLSID- when registering COM library objects for all system users;

HKCU\SOFTWARE\Classes\CLSID- when registering COM library objects only for the current user;

HKLM\SOFTWARE\Wow6432Node\Classes\CLSID- for registering 32-bit DLLs in 64-bit Windows OS;

When registering, a key with a name equivalent to the globally unique identifier is created in the specified registry section GUID registered object. GUID, in relation to COM, is a class identifier. To distinguish class identifiers from other identifiers, they use a registry subkey called CLSID. A GUID is a 128-bit hex value enclosed in curly braces:

(23170F69-40C1-278A- 1000-000100020000

When registering in the registry, a subkey is created with a name corresponding to the GUID, containing information about the path and name of the executable file, its version, registration time, information about the developer, and other parameters that determine the specific properties of the registered object. Deleting or corrupting registration data causes the registered system component or application program to become inoperable, usually accompanied by a DLL lookup error message and a prompt to reinstall the problematic software. Instead of reinstalling, it is quite possible to get by by re-registering the damaged object using the utility regsvr32.exe available in all versions of the Windows family of operating systems.

Utility regsvr32.exe is a standard command line program for registering and unregistering OLE controls, ActiveX controls, and DLLs in the Windows Registry. On 64-bit versions of Windows, there are two versions of the file regsv32.exe:

64-bit version in the catalog %systemroot%\System32(usually C:\Windows\System32)

32-bit version in the catalog %systemroot%\SysWoW64(usually C:\Windows\SysWoW64)

The utility requires elevated privileges to operate, so the command prompt window must be opened with administrator rights (“Run as administrator”).

On startup regsvr32.exe without command line parameters, or when launched with incorrect parameters, a hint is displayed:

REGSVR32 command line format:

Regsvr32 ] DLL file

/u- - calls DllUnInstall, unregisters the server

/i- calls DllInstall, passing it an optional command_string as a parameter;

/n- does not call DllRegisterServer; can be used with the /I switch;

/s– “quiet” mode; message boxes are not displayed;

Examples of using regsvr32.exe:

regsvr32 /u "C:\Program Files\7-Zip\7-zip32.dll"- unregister the specified DLL. If cancellation is successful, the following message is displayed:

To suppress message output, use the parameter /s:

regsvr32 /u /s "C:\Program Files\7-Zip\7-zip.dll"

As a result of executing this command, the 7-Zip archiver item will disappear from the Windows Explorer right-click context menu. To restore it, you need to register 7-zip.dll with the command:

regsvr32 "C:\Program Files\7-Zip\7-zip.dll"

You must not forget about the bit depth of registered objects in 64-bit versions of the OS. If it is necessary to register a 32-bit object, you must explicitly specify the path for the 32-bit edition of the utility regsvr32:

%SystemRoot%\syswow64\regsvr32.exe

Or without using environment variables:

C:\Windows\System32\regsvr32.exe

As an additional software tool for managing the registration of COM objects, it is very convenient to use the free utility from Nirsoft RegDLLView.exe. The program does not require installation on the system, is small in size and allows you to:

Receive a convenient list of all objects registered in the system.

Register or unregister selected objects.

Create a reg file to perform unregistration of one or more DLLs.

Register or re-register the specified file.

In addition, it is possible to check the digital signatures of executable files of registered objects, view or change their properties, and also launch the registry editor with information displayed for the selected GUID through the “Open in Regedit” context menu item, called up with the right mouse button.

Installing a game or heavy application involves automatic installation and registration of the necessary DLLs in the Windows operating system. DLLs are dynamic libraries that can be accessed multiple times by multiple applications. If an error occurs when a game or program attempts to access a specific DLL, the user will see the message “dllregisterserver entry point not found” or “cannot launch, missing .dll file.” These and other errors indicating problems when accessing a dynamic library can be resolved if you independently register the required DLL file in Windows.

Why does an error occur when accessing a DLL?

DLLs are added to the operating system when Windows is updated and when applications are installed. Based on this, we can identify the following main reasons why an error occurs indicating the absence or problems with the DLL file:

• The DLL was not installed. There may be two reasons for this - Windows has not been updated to the current version, and the library comes with one of the latest updates, or the game/application during installation for some reason did not install and register new DLLs.
  Note: Most often, all the necessary DLLs are included in the installation files of the application, and developers do not expect that the necessary components have already been installed on the computer.
• Damage to DLLs. This problem most often occurs if the DLLs were damaged by virus software or careless user actions, for example, making changes to the registry that led to damage to the dynamic libraries.

Most DLLs are installed on the computer along with DirectX, so if, when installing a game or application, you are prompted to update/install DirectX, you do not need to refuse it, otherwise there is a high risk of the error “cannot be launched, the .dll file is missing.”

How to Register a DLL on Windows

If for some reason Windows does not have a DLL required to run games and applications, the user can register it themselves. This can be done in two ways, by first downloading the necessary DLL onto the computer.

Registering DLLs Using the Command Line

To register a DLL existing on your computer via the command line, do the following:

Registering a DLL Using the Run Line

Registering a DLL through the “Run” line is practically no different from actions with the command line. The user needs:

What to do if you can't register a DLL

It is possible that Windows will issue an error when responding to the library registration command, indicating that the module is loaded, but the DllRegisterserver entry point was not found. There are likely other variations of similar errors that prevent the DLL from being registered. Such errors occur for the following reasons:

If you encounter errors when trying to register a DLL, the first step is to try downloading the official component from the vendor to eliminate the possibility of a dummy file. To do this, you will need to use a search engine and find which system component the problematic DLL belongs to.

In rare situations, problems with registering a DLL may occur if it is not in the same folder as the component or application's executable file.exe. In this case, you need to move the library to the folder with the executable file and try to register it again.

Check out how this method works. To register a DLL file, you can use the "regsvr" command and the name of the DLL file (if the file supports this command). This will create a path from the Windows registry to the DLL file, making it easier for the system to find and use the file.

• Typically, this method is used to register DLL files that belong to third-party programs and that directly interact with system utilities (for example, the command line).

Understand the essence of the “entry point” error. If the DLL file is already registered, it does not support the "regsvr" command, or its code does not allow you to connect to the Windows Registry, you will receive the error message "The module was loaded but the entry point DllRegisterServer was not found." loaded, but DllRegisterServer entry point not found). If this message appears on your screen, you will not be able to register the DLL file.

• The "entry point" error is not so much a problem as it is a confirmation that the DLL file does not need to be registered.

Users ask about how to register a dll file in Windows 7 and 8. Usually after encountering errors like “The program cannot start because the required dll is not on the computer.” Let's talk about this.

In fact, registering a library in the system is not such a difficult task (I’ll show you three variations of one method) - in fact, only one step is required. The only mandatory requirement is that you have Windows administrator rights.

However, there are some nuances - for example, even successful DLL registration does not necessarily save you from the “library is not on the computer” error, and the appearance of a RegSvr32 error with a message that the module is not compatible with the version of Windows on this computer or the DLLRegisterServer entry point was not found. does not mean that you are doing something wrong (I will explain what this means at the end of the article).

Three ways to register a DLL in the OS

In describing further steps, I assume that you have found where you need to copy your library and the DLL is already in the System32 or SysWOW64 folder (and possibly somewhere else, if it should be there).

Note: below we will describe how to register a DLL library using regsvr32.exe, however, please note that if you have a 64-bit system, then you have two regsvr32.exe - one in the C:\ folder Windows\SysWOW64, the second is C:\Windows\System32. And these are different files, with the 64-bit one located in the System32 folder. I recommend using the full path to regsvr32.exe in each method, and not just the file name, as shown in my examples.

The first method is described on the Internet more often than others and consists of the following:

Press Windows key + R or go to the Start menu Windows 7 select “Run” (if, of course, you have it enabled). Enter regsvr32.exe path_to_dll_file Press OK or Enter.

After this, if everything went well, you should see a message stating that the library was successfully registered. But, with a high probability, you will see another message - The module is loaded, but the DllRegisterServer entry point was not found and it is worth checking that your DLL is the correct file (as I already said, I will write about this later).

The second method is to launch the command line as an administrator and enter the same command from the previous paragraph.

Run command prompt as Administrator. In Windows 8, you can press the Win+X keys and then select the desired menu item. In Windows 7, you can find the command line in the Start menu, right-click on it and select “Run as administrator.” Enter the command regsvr32.exe path_to_dll_library (you can see an example in the screenshot).

Again, it's likely that you won't be able to register the DLL on the system.

And the last method, which can also be useful in some cases:

Right-click on the DLL that you want to register and select the “Open with” menu item. Click “Browse” and find the regsvr32.exe file in the Windows/System32 or Windows/SysWow64 folder, open the DLL using it.

The essence of all the described methods for registering a DLL in the system is the same, just slightly different ways of running the same command - whichever is more convenient. And now about why nothing works out for you.

Why can't I register the DLL?

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So, you are missing some DLL file, due to which when you launch the game or you see an error, you downloaded this file from the Internet and try to register, but either the DllRegisterServer entry point or the module is not compatible with the current version of Windows, or maybe and something else, that is, DLL registration is impossible.

Not all DLL files are designed to be registered. In order for it to be registered in this way, it must have support for the same DllRegisterServer function. Sometimes the error is also caused by the fact that the library is already registered. Some sites offering to download DLLs actually contain dummy files with the name you are looking for and they cannot be registered, since they are not actually a library.

And now how to fix it:

If you are a programmer and are registering your DLL, try regasm. exeIf you are a user and something does not start for you with a message that the DLL is missing on computer- look on the Internet what kind of file it is, and not where to download it. Usually, knowing this, you can download the official installer, which will install the original libraries and register them in the system - for example, for all files with a name starting with d3d, it is enough to install DirectX from the official website, for msvc - one of the versions of Visual Studio Redistributable. (And if a game from a torrent does not launch, then take a look at the antivirus reports; it could have deleted the necessary DLLs, this often happens with some modified libraries). Usually, instead of registering a DLL, placing the file in the same folder as the executable file works which requires this library.

I conclude with this, I hope something has become clearer than it was.