Not so much a suggestion, but also a request.
I would really like to find a program (free or otherwise) that allows you to right click a file in Explorer or My Computer that from the context menu allows you to see what programs use that file, and vice versa.
For instance, check an DLL file to see what installed programs use it. Also, check an EXE file to se what files are needed for that program to run.
I did have that facility many years ago on a very old computer, but I have forgotten what program it was that achieved it.
Cheers,
Postyr