Changing working catalog on IIS
If you want to keep your directories neat and tidy and uses IIS you will end up with a "HTTP 401.3 - Access denied by ACL on resource" error after you have made the change of working catalog in IIS.
I want to have all my development code under a master folder in my home folder with the name development and then subfolders for the type of code it is like html, java, delphi, c++ and so fourth.
To be able to test the code without have to move or copy it to the Inetpub/wwwroot folder over and over again I changed the working catalog in IIS to the development folder.
The result was that I couldn't browse to this webfolder after that and instead received a "HTTP 401.3 - Access denied by ACL on resource" to the browser.
The reason for this is that the default user hasn't got access rights to read your catalog - and thanks for that.
Solution:
Make sure that you are never going to place your computer connected to the internet without a secure firewall and the change the anonomous account to yours. Then it will work as supposed again.
Beware that this is a security issue you are creating but it is fine if the above is in concideration.

