You already mentioned fraud.sysguard so I suggest that you backup your data and scan your PC with Superantispyware and Malwarebytes to get a second opinion of your PC.
http://forum.avast.com/index.php?board=4.0
I have used various firewalls and antivirus but i was sure to uninstall and used a registry cleaner to remove leftover
files etc.
None were active when i installed avast.
In the firewall settings i was told to copy ashwebsv.dll to application rules and set to TCP Port 12080
and i copied iexplorer.exe (internet explorer) and set to Port 80.
I only got access by stopping the web shield.