How to Register and Un-register a .dll or .ocx File in Windows

This article explains how to register and unregister a .dll file on windows operating systems.

Replacing old .dll files in windows may be useful, if you have an old version of the file on you computer which is causing problems.

For example, if you have an old file from a previous installation of a program and it causes that program to function incorrectly or crash.  

The following steps detail the process on how these problems may be overcome.

Copy the .dll or .ocx to windoes system file.

All .dll and ocx files can be found directly under the following location.

c:\windows\system32

Copy your new file to this location. If the file already exists, you can either overwrite it, or the best thing to do is rename the old one and place the new one in.

Click the Start button on your computer then go to Run.

Type the following - cmd then hit the return key.

For Windows Vista users, its better to run the command prompt as the administrator. To do this simply right click on the command prompt icon and choose "Run as Administrator"

This will open command prompt.

Register

To register your new .dll or .ocx file run the following command.

regsvr32 example.dll

Where "example" is the name of your file.

If done correctly you will be prompted with a successful message.

Unregister

In order to un-register a .dll or ocx file. Add -u after the regsvr32 command.

regsvr32 -u example.dll

If done correctly you will be prompted with a successful message.

There you have it! Let me know if this comes in use for you!

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