Neither of those are any danger at all. The uninstall key is just that, it provides information on uninstalling an app. Possibly Norton, since that app was adversely affected when you deleted it.
The other one is an MS security center service key. Looks like it's been set to enable notification of something. Generally (but not always) a "0" will mean off, and "1" will mean on. And a "0" setting on a "disablexxx" key (making it a double negative) means that notify is enabled.
I'd say those are both false positives.
One thing to remember about registry keys, even if they were key made by bad programs, the keys themselves are usually pretty harmless, with the exception of keys that control Window's behavior. Deleting them is much less important than deleting the programs themselves.