To remove the MathML Viewer, search for the file
and delete it. For Windows, this file is usually located in the %NETSCAPE%\Program\Java\download directory. For Unix, this file is usually located in ~/.netscape/java/download.
To remove the MathViewer, point Internet Explorer to the pseudo-URL
%WINDIR%\Downloaded Program Files
and remove the file if it appears there.
Also, go to
and delete the following directories (if they exist).