Unable to load plug-in library error msg during uninstall...

[Steve]

Hello;
I am getting the following error message whenever I perform an uninstall or update:

Unable to load plug-in library. Please rebuild your project and make sure all required plug-ins are installed. Action skipped.

I can't seem to determine what plug-in would be causing this. Any suggestions from anyone in how to track the cause of this error down?

Thanks in advance,
Steve