OK more details.
Windows XP service pack 3, english. All windows updates applied. No other security software installed. It is a clean installation of windows using MSDN as resource - no infection on the computer.
Using avast Pro 5.1.889 english, clean installation (i.e. not an update), legal license file supplied (can provide evidence of this, since I am a paying customer).
During installation, only the filesystem module selected, i.e. NO virtualization, NO webshield, etc.
Lets now go through settings:
Open avast interface and go to settings.
In BASIC, uncheck “Show remote content…”
In UPDATES, select “Manual update” for both options. In UPDATE parameters, having either or both or none of the options selected makes no difference - avast still connects (what do they do anyway?)
In STATUS BAR, uncheck “Virus definition version”, “Program version”, “Definition auto updates”.
In COMMUNITY, uncheck “Participate in avast…”
All other settings left at default.
The computer does not have Adobe Flash installed - hence it cannot be flash trying to autoupdate.
The connection is a DNS request (going to port 53 of my DNS server) from AvastUI.exe.
Blocking this connection has no effect on update features of Avast - manual update works flawlessly.
Please tell me what more you need - I need this resolved.