Hi Peter,
Thanks that you are still looking into my problem. I did not uninstall 5.04. What happens is that the installation stops at the moment you see the error message on the picture (creating folders). Then it rolls back. I guess that means it un-installs itself.
You may be right that it is a permission issue, but then this is still specific for RED 5, since I could install RED 4 back without any problem. But also if it is a permission issue, I really would like to know how to proceed. A google search with error 1926 gave some hits, but not a clear solution.
When I’m at home tonight, I will do a registry cleaning and then try to re-install 5.02 as you suggested. I will let you know if that helps.
Theo