Warning: Unregistering DLL files is very risky. If you unregister the wrong DLL file, your computer can crash. Back up important files. Set a Restore point
(click Start > All Programs > Accessories >
System Tools > System Restore).

To unregister DLL files, you need to do the following steps:

1. Open a Command Prompt window.
(click Start > Run and type “cmd”)

2. After you have opened a Command Prompt window,
locate the DLL on your pc. ( C:\BadDLLFolder>)

3. Unregister the bad DLL in the BadDLLFolder
( C:\BadDLLFolder>regsvr32 /u Bad.dll)

4. Should get a message of a successful unregistered DLL.

Warning: registering DLL files is very risky.
If you register the wrong DLL file, your computer can crash.
Back up important files.
Set a Restore point
(click Start > All Programs > Accessories >
System Tools > System Restore).

To register DLL files, you need to do the following steps:

1. Open a Command Prompt window.
(click Start > Run and type “cmd”)

2. After you have opened a Command Prompt window,
locate the DLL on your pc. ( C:\GoodDLLFolder>)

3. Register the good DLL in the GoodDLLFolder
( C:\GoodDLLFolder>regsvr32 Good.dll)

4. Should get a message of a successful registered DLL.