Excel VBA Run-time Error '32809' - Trying to Understand it

Question

A colleague at work made some changes to one of our macro workbooks and now on my PC only I receive the dreaded Run-time Error \'32809\' when I attempt to run it. This lates

Answer 1

I have encountered similar (nearly unexplainable) behavior

Found a reference to deleting .exd files under the directory C:\Users\username\AppData\Local\Temp Located one in each of the directory Excel8.0 and VBE. Typical name is MSForms.exd

Google "Excel exd" or "KB 2553154" From my perspective, it is a completely unacceptable situation which has been there for at least a month now.