>Thanks for your advise Bruce. What happens here is that my colleagues need to know my password because my PC triggers several administrative and batch programs every night and they need access to check this up. I guess that I will not be able to restrict access to the IE's history without making my password secret ...

I guess the next thing would be to contact your LAN/IT people to see if you can get them to increase the history time a little more in whatever they use to "clean" it, maybe it can be done locally.