Avira,Avast! and Nod32 and a few other antivirus programs are mcuh better then Norton. They are also free, too. Norton digs itself deep into the operating system and mucks up everything- if you remove it and replace it with Avira, Avast!, or Nod32 I can guarantee a noticable increase in both speed and security.
Of the three- it pretty much boils down to which one you prefer, so check them all out and see which one you like best
Also- you should still post the logs up in the viruses/malware forum, just to get the OK from the specialists that your PC is clean.