The problem appears randomly.
That is, today when I started the computer, it didn't show up.
Yesterday it did, and tomorrow, or the day after that, it will again. (I usually only start the computer once every day and then I keep it running)
But it appears after login, not at boot.
Next time I get the error-messages, I'll restart the provider and see if I get the same messages again.
Could it have anything to do with the fact that I once used Outlook Express, but I don't anymore?
Or should I dive right at my firewall and try to disable that? (I'd rather not do that...)