The Regsvr32 tool is a command-line utility that can be used for registering and un-registering OLE controls like DLL and ActiveX (OCX) controls in the Windows operating system. If you find that some of your Windows 11/10/8/7 functions are not working properly, you may need to register your dll files.
This tutorial will tell you how to register or unregister a DLL file using the built-in Regsvr.exe or some freeware Register DLL Tools.
Register dll file
To register a dll or ocx file, open a command prompt as an administrator, type the following and hit Enter:
regsvr32 "path & filename of dll or ocx"
Re-register all dll files
To register ALL dll files, open the directory which is holding all the DLL files. Then open a command prompt in that folder, type the following and hit Enter:
for %1 in (*.dll) do regsvr32 /s %1
If you have a file list, use:
for /f %%i in (files.txt) do regsvr32 /s C:\Winnt\System32\%%i
Unregister dll file
To un-register a dll or ocx file, open a command prompt as an administrator, type the following and hit Enter:
regsvr32 /u "path & filename of dll or ocx"
This will register or unregister the dll file.
Register DLL Freeware
If you wish, you can also use third-party freeware to do so easily. There are a few like Rootreg, Register/Unregister OCX/DLL Utility, RegDllView, etc, will let you do the same easily. Emsa Register DLL Tool, unfortunately, is not free anymore.
TIP: What are DLL Orphans? Find out!
This post will help you fix missing DLL file errors on your Windows PC.
Looking to learn more about other files, processes, or file types, or file formats in Windows? Check these links: