|Found this off Annoyances.org:|
Go to the following link and download this copy of RUNDLL32.EXE:
Go to the location you downloaded the file, right-click it and select COPY.
Next select Start/Run, type C:\WINDOWS in the 'Open' box and press enter.
Now right-click in the Windows folder that opened and select PASTE.
If prompted to overwrite the file, answer 'Y'....YES.