i did all what you described.
Thanks i learned a great deal regarding safety during the complete process of virus removal.
One thing that did not work out was to uninstall ComboFix:
* Click START then RUN
* Now type Combofix /u in the runbox and click OK
When i did that Combofix just ran again but is still installed on my system.
Is it a security thread or can i just leave it installed?
Further Spybot also seems to deal with the Host issue.It is writing something into the host.txt file. Is it still necessary to run MVPS Hosts?