found the problem. All the work arounds i found in the lavasoft site and this forum didnt worked (e.g. the compatability settings, interactive logon, terminal service). But when i checked my mcaffee firewall settings i found ad-aware admin application and ad-aware service application being blocked for some reason. I personally didnt do this. And im the only one using my comp.. anyways, i enabled them, tried to do an update and its now updating! Last Update: 2009-08-01 Definition File: 0149.0018 So better check your firewall settings as well..