Oh, I know how to configure Avast or any other AV software. My concern is when other people (see my first post) see such messages and don't know what to do. While it's merely bugging me, it's actually harming those people.
The default action in The Behavior Shield when installing Avast! is " Auto-Decide ". In this setting Avast! will allow files coming from Microsoft updates. Sample from my Behavior Shield for those updates:
30/12/2011 9:17:08 Modification of: \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\RunOnce\NetFxUpdate_v1.1.4322
By: C:\WINDOWS\Installer\MSI9C.tmp
Via: C:\WINDOWS\system32\MsiExec.exe
-> Action allowed
30/12/2011 9:17:08 Modification of: \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\RunOnce\NetFxUpdate_v1.1.4322
By: C:\WINDOWS\Installer\MSI9E.tmp
Via: C:\WINDOWS\system32\MsiExec.exe
-> Action allowed
30/12/2011 9:19:43 Modification of: \REGISTRY\MACHINE\System\CurrentControlSet\Services\aspnet_state\Type
By: C:\WINDOWS\Installer\MSI173.tmp
Via: C:\WINDOWS\system32\services.exe
-> Action allowed
30/12/2011 9:19:52 Modification of: \REGISTRY\MACHINE\System\CurrentControlSet\Services\clr_optimization_v2.0.50727_32\Start
By: C:\WINDOWS\Installer\MSI17F.tmp
Via: C:\WINDOWS\system32\services.exe
-> Action allowed
30/12/2011 9:19:52 Modification of: \REGISTRY\MACHINE\System\CurrentControlSet\Services\clr_optimization_v2.0.50727_32\Start
By: C:\WINDOWS\Installer\MSI180.tmp
Via: C:\WINDOWS\system32\services.exe
I do not know if the criteria that Avast! team has set for the behavior Shield will also allow other secure ( white list ) programs, But if the person who install Avast does not know zip about computers, and does not mess arround with Avast! setting I am pretty sure He/She will have no problems because of it.
On the other hand if the behavior shield is set to auto-decide and out of the blue come out an alert, well that is why people have a security program to alert them of something that is not right, and if in doubt better to block than to be sorry latter on.
Happy New Year.