Process Explorer, free, www.systinternals.com .
For those of you interested, there is a version 8.52.00 available. I may be
late with this announcement, but, I just found it. The new version has some
added features and doesn't seem to be nearly as resource hungry as the
earlier ones (not that they were ever a problem, just better now).
Heirloom, old and eventually finds things on my
own