You mentioned your trouble shooter process and I would like to add one more thing.
From time to time I get a Bad DLL message out of the blue.
This seems to happen after a long development session.
I know that code gets saved in pieces when you change code, not like the olden days when we used to write source code then compile from scratch and link edit.
So when something odd happens I do a /decompile and the problem goes away.
In fact, I have got into the habit of regularly decompiling in an effort to keep things clean.
This may be over kill but it does no harm.