Regsvr32 is a command-line tool in Windows that represents Microsoft Register Server. It’s used to sign up and unregister Item Linking and Embedding (OLE) manages like.DLL files and ActiveX Control.OCX files.
When regsvr32 signs up a DLL file, info about its involved program files is contributed to the Windows Registry. It’s those recommendations that other programs can access in the computer system registry to understand where the program data is and how to interact with it.
You may require to register a DLL file if you’re seeing a DLL mistake on your computer. We explain how to do that below.
How to Register and Unregister a DLL File
If the referrals in the Windows Registry that refer to the DLL file are in some way eliminated or corrupted, programs that require to use that DLL file may stop working. It’s when this association with the computer system registry is broken that a DLL file ought to be registered.
Signing up a DLL file is typically achieved by re-installing the program that registered it in the first location. In some cases, however, you may need to register the DLL file yourself by hand, via the Command Prompt.
Tip: See How to Open Command Prompt if you’re not exactly sure how to find it.
regsvr32 [/u] [/n] [/i[:cmdline]]
This is the right way to structure a regsvr32 command:
regsvr32 myfile.dll regsvr32 /u myfile.dll
For example, you ‘d enter this first command to sign up a DLL file called myfile.dll, or the second to unregister it:
Other parameters you can use with regsvr32 can be seen on Microsoft’s Regsvr32 page.
Note: Not all DLLs can be signed up by simply going into the command above into a Command Prompt. You may require to first close down the service or program that’s using the file.
How to Fix Common Regsvr32 Errors
Here’s one mistake you might see when attempting to sign up a DLL file:
The module was loaded but the call to DllRegisterServer failed with error code 0x80070005.
This is normally a consent concern. If running an elevated Command Prompt still does not let you sign up the DLL file, the file itself may be obstructed. Check the Security section of the General tab in the file’s Properties window.
Another possible problem could be that you do not have the proper authorizations to use the file.
A similar error message is worded like the one listed below. This error typically indicates that the DLL is not being used as a COM DLL for any application on the computer, which indicates there is no requirement to register it.
The module was loaded but the entry-point DllRegisterServer was not found.
Here’s another regsvr32 mistake message:
The module failed to load.Make sure the binary is stored at the specified path or debug it to check for problems with the binary or dependent.DLLfiles.
That specific error might be due to a missing reliance, in which case you can use the Dependency Walker tool to see a list of all the dependencies that the DLL file requires – one might be missing that you require to have in order for the DLL to sign up properly.
Also, make sure that the course to the DLL file is spelled right. The syntax of the command is extremely crucial; an error may be tossed if it’s not gotten in correctly. Some DLL files may require to have their area surrounded in quotes like “C: \ Users \ Admin User \ Programs \ myfile.dll”.
See the “Regsvr32 Error Messages” section of this Microsoft Support short article for some other error messages and descriptions for what’s causing them.
Where Is Regsvr32.exe Stored?
32-bit variations of Windows (XP and more recent) add the Microsoft Register Server tool to the %systemroot%\ System32 \ folder when Windows is first installed.
64-bit variations of Windows save the regsvr32.exe file not only there however likewise in %systemroot%\ SysWoW64 \.