How to Delete MSO.DLL

1. Open the Start menu and type 'regedit' into the Windows Live Search Box. Windows XP users should select the 'Run' command and type 'regedit' into the textbox that pops up. This opens the Windows Registry Editor.
2. Navigate to the following registry key in the Editor window:HKEY_CLASSES_ROOT\TypeLib\{2DF8D04C-5BFA-101B-BDE5-00AA0044DE52}\2.2\0\win32
3. Locate the MSO.DLL file description in the registry key. This will tell you exactly where the file is located on your computer. Note this, as you will need to remember it later.
4. Right-click on the registry key and then select 'Delete' and 'Yes' to completely erase the key. This will enable you to delete the MSO.DLL file off your hard drive.
5. Navigate to where the MSO.DLL file is located on your hard drive, select it and press the 'Delete' key. Confirm your choice to send the MSO.DLL file to the recycle bin.