Hi Everyone, 
Right I have installed and registered with the code Avast Home on my sisters PC, I have a Comodo Firewall running and when Webshield is active there is no internet, I can only use the net while I disable Webshield, not even clicking on Pause works. Any help would be appreciated.
Her system is a NEW Dell Inspiron 530, this has Norton as a trial but was removed completely.
I run exactly the same setup at home except for the OS mine is XP pro.
Avast! web shield does its virus scanning by acting as a proxy for port 80 http requests so that it can scan incoming web traffic before it hits your browser. You are actually connecting to the web using a program called ashwebsv.exe, not your browser. If you go to the Comodo firewall rules, you need to be sure ashwebsv.exe is using the default rules for a web browser.
That is weird as I have same programs running on my XP system and not had to do this. 
Thanks will have a go will report back. 
It isn’t weird, depending on firewall, its setup, some block and don’t ask permission.
However in this case there is another element the previous presence of Norton, notorious for remnants even after an uninstall.
So I don’t know how far you went in the ‘completely’ removed Norton from your sisters PC, if you haven’t tried this I would suggest you do.
A link worth looking at, which is a program removal tool that can remove the remnants of a number of different Norton Programs:
Removing your Norton program using SymNRT
Problem is I’m not sure which program to choose as I have no idea which norton was installed.
Ah now that could be a problem ans one unfortunately I don’t have a suggestion for.
Though if this is a relatively new system it is likely to be one of the later products (2008), but was it a standalone anti-virus or the security suite is the question.
Just to BUMP this, I am still unable to update the avast, I have tried practically everything and nothing has worked:
Disabling the Comodo firewall does not work.
I have deleted all setting in Comodo and manually added all the instances of AV to rules still does not help.
I am not able to connect to the net when Webshield is running also I am still unable to update the definitions, I have to manually download them and installed them.
I am lost as what I can do to resolve this issue, other than get a different make of AV.
Did you already use the Norton-Removal-Tool?
If not, you should use it and then uninstall Avast and reinstall it.
Usually it works then…
yours
onlysomeone