I would like to thank you for the hints. Although much of the tool can do much more than I really need - I think I will have a closer look and make use of one of them in the near future.
Never the less the main problem is that a user often not knows what he just has done (before the problem happened). => Such a tool could help him to give better hints to development to localize the problem.
Any hints for shareware tools would be appreciated.