Send Shield: This is an interesting little Add-in: it basically eliminates the problem of sending Office files with too much information on Outlook. Apparently, people send tracked changes and other comments in document attachments (and that can be quite embarrassing.) The plug-in strips out all that extra metadata when sending files like documents and spreadsheets. It is still in beta and available for download here.
How to enable and disable Add-in's in Outlook 2007:
This describes how to re-enable/enable and disable add-ins in outlook. This is how to correct a program that installs an outlook plugin that you don’t use or want.