Many need the short lesson about permissions. I can't give the long version here. That's covered in books and classrooms. So here's the short lesson.
The admin account must still obey PERMISSIONS set on files and registry. This error is also known when Spybot is installed so dump that and try again if that applies.
Back to registry permissions. You need to find the key that it complained about. Then you can add your admin capable account to it's permissions, owners and such.
More reading at http://www.google.com/search?hl=en&source=hp&q=XP+REGISTRY+PERMISSIONS
Fairly advanced stuff so give yourself time to learn up.
I have a Dell Dimension 4400 with Windows XP. I have Lotus SmartSuite 97 loaded and it runs fine. I thought I would update to a new version so I could run Lotus on a New desktop with Vista which I plan to purchase down the road. Any way, I bought Lotus SmartSuite 9.8.1 which is designed to run on XP and tried to load it in the Dell. It loaded ok with no warnings and booted up without a hitch, except when I accessed 123, I got a warning box that said the following: Registry Error- You cannot write into the registry because you do not have the appropriate privileges. I am logged on as the administrator for this computer so I don't understand. The old program runs OK. Has anyone else had this problem? Do I have to edit the registry? If I do, I haven't a clue on how to do it. Thanks