How to Unregister a DLL File in Windows XP

1. Click 'Start' and then 'Run' to call up the Windows 'Run' dialog box.
2. Type 'cmd' (without quotation marks) into the box and press 'Enter.' This calls up the Windows Command Prompt.
3. Type 'regsvr32 /u filename.dll' where 'filename' is the name of the DLL file that you are attempting to unregister. Press 'Enter.' A confirmation window stating 'DllUnregisterServer in (file name) succeeded' will be displayed.
4. Click 'OK,' then close the Command Prompt.