Failed
to register ocx file errors appear when installing v20 of the SmarTeam Viewer.
In order to resolve this issue install the
Microsoft Visual C++ 2008 SP1 Redistributable Package before installing v20 of
the SmarTeam Viewer.
Here is a link to the Microsoft Visual C++ 2008 SP1 Redistributable Package:
http://www.microsoft.com/download/en/details.aspx?displaylang=en&id=5582