Norton Internet Security and spybot, adaware compatible?

I have norton Internet Security2005. Can I also download Spybot and adaware personal Se and install? My son in law bought Norton Internet Security 2006 and found that he had to remove Spybot from his computer as Norton would not install unless he did so. Please help Thanks

Off hand, I would say that the answer to your question is, "YES". I had Norton 2004, and had no problems. When I upgraded to Norton 2006 I had a problem, but it wasn't with Ad-Aware or Spybot (which I left installed). The problem I had was because there was a registry key that the upgrade didn't take into account that I had to manually remove. Well… Let me back up a step… I installed OK, it was that it when I updated the definitions the "Last Update" date never changed. I had to "Uninstall", remove the registry key, then re-install, and all was OK.

Thanks for the prompt replies. I shall ask him to re-install spybotS&D. Shall let you know how it goes. Thanks again