Because update 18 doesn't contain any security fixesI made the correction and am now at version 6 update 18. I wonder why the Secunia check didn't catch that?

Norton finding was part of infection. There was also DNS changer present. If the infection came while surfing then it's possible some vulnerability in your software (maybe Adobe Reader for example) was exploited.What exactly did we (I mean you) find wrong or fix? This whole thing started for me with norton detecting Backdoor.Tidserv!inf and saying I needed to reboot to rid myself of it, which didn't go well. Was that actually the problem or was there that and more?