Your logfile is clean and there's nothing untoward in there that should be stopping us.
Just an old remenant of the AVG8 uninstall that you can have HJT take out if you like
O2 - BHO: AVG Safe Search - {3CA2F312-6F6E-4B53-A66E-4E65E497C8C0} - C:\Program Files\AVG\AVG8\avgssie.dll (file missing)
This isnt affecting the current concerns though.
Dang this.....We must be missing something easy.
AVG7.5pro also has its own firewall built in, are you sure you have disabled it and ZA before attempting connection?
Personally, i would ditch AVG and use Avast Free edition available here:
http://www.majorgeeks.com/Avast_Home_Edition_d1968.html
I guess were not that concerned about an AV just yet as we cant even access the internet to get infected....lol
I think youve tried everything that comes to mind at the moment.....I gotta go to bed but ill think some more on this.
Try uninstalling AVG and ZA without installing anything else, Run CCleaner after the uninstalls and then attempt connection again.
http://www.majorgeeks.com/CCleaner_W...bar_d5125.html
Dont install the crappy Yahoo toolbar though (unless you want it)
I assume your bypassing all routers etc and connecting the cat5e directly to your pute from modem(ie using the same physical setup connection that works on another system)