Hi Erik,
Thanks for that. I have done as you suggested, checked the Microsoft site out and made the changes and there is still no 'Security' tab in the Web Properties page.
However there is now a 'Sharing and Security' item in the right-click context menu. When clicked it takes you to the Web Properties/Sharing page where I have enabled 'Share this folder' and seen a name come up (that of my virtual directory) in the Share name box.
I have variously tried both "Maximum allowed"and "Allow this number of users" (set it at 1) and then clicked"Permissions". This brings up a page "Permissions for (virtual directory name), with Group or user names" (Everyone) and then in the Permissions for everyone there is only "Full Control", "Change" and "Read", no mention of "Modify"
I have enabled all these, cleared all my temporary files, restarted and then tried to open the virtual directory via localhost in my browser. After all this I am still getting the dreaded HTTP Error 403 message.
I have also disabled "Read Only" in the "General" tab, although I notice is reselected on subsequent visits back to the Web Properties page.
Any more ideas?
I have run out of them and am beginning to wonder whether it is worth persisting with DNN. I wonder how I am going to get it installed on a remote webserver when I can't get it going on my local machine?
Anyway thanks for your help