Remove Norton immediately (if you can - I've heard it embeds itself pretty deeply). Burn the CD it came on. Never, ever go near it again. Huge piece of stinking ****.
If you feel that you *must* have an antivirus on your Mac (kind soul that you are, protecting Windows users from viruses that you may accidentally pass on to them), then I highly recommend the free, open-source ClamXav. It's brilliant.
Meg - sorry for the quick piling-on about Norton. Those of us who have suffered from using it in the past are rather emphatic about our hatred of that product.
Here's something perhaps more helpful: Snow Leopard Compatibility Chart. It shows you which versions of which programs are compatible with Snow Leopard, and to what degree.
It claims that Norton Anti-Virus 11.0.3 is Snow Leopard Compatible.
Norton Internet Security 4.0 is Snow Leopard Compatible.
You can use a program called AppZapper to get rid of it.
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Ok. Time for me to stop drinking coffee late at night. Have re-read your message, and see that you say that you did not install Norton, but you're getting a message from Norton.
That's pretty odd.
To find out if Norton is indeed running, I'd do two things:
1/ Open the Applications folder. Then open the Utilities folder.
2/ Launch the program "Activity Viewer"
3/ See if there is anything labelled "norton" or "nav" or something similar.
Or
- search your hard drive for "Norton".
Or
- open System Preferences, check the bottom couple of rows. Anything unusual installed there?
It sounds like you've been updating from previous systems and never doing a clean install when you've updated your OS. That, or maybe someone else tried to install Norton on your machine? I would ask if anyone has access that might be able to do it, just to see if someone might have tried.
My suggestion, if it's the former situation, is to do a clean install. Make sure you back up everything and use Migration Assistant to copy all of your Applications and Files back. This will clean up a lot of stuff that might be lingering on your machine.
If it's the latter.. provide a serious whipping with a wooden spoon over knuckles.. and then, try App Zapper, or a program called AppDelete (same as App Zapper but free).
If you find that your machine is running fine, it may indeed be fine. Apple provided a way to stop incompatible software from trying to run on your machine, that very well might be the message that you received... and in that case, I wouldn't worry about it too much.
Is it perhaps a pop up window disguised to look like Norton? I have seen on Windows, and I am sure you all have, those pop ups that look like a virus scan telling you your infected.
When does this "norton" message pop up? When your using Safari?
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