Well, first of all, you should go ahead and uninstall ComboFix since you don't need it anymore. Go to Start > Run and type
combofix /u (note the space between combofix and /u) and click OK.
If that doesn't work (or if it does work, do this anyway), then download
OTCleanIt.exe and save it to your Desktop.
- Double-click OTCleanIt.exe.
- Click the CleanUp! button.
- Select Yes when the "Begin cleanup Process?" prompt appears.
- If you are prompted to Reboot during the cleanup, select Yes.
- The tool will delete itself once it finishes, if not delete it yourself.
As for Norton...if I were you, I would ditch it completely. You would be much better off with AVG or Avast; they surpass Norton and they're free. As for a firewall, I would go with Comodo, ZoneAlarm, or Kerio Sunbelt. Just pick one you like, download it, disconnect from the internet, disable Windows Firewall, install the new one, and restart. I assure you that your security will increase significantly.