My firewall (ZoneAlarm) is set to allow Avast. I’m running XP Home SP2 on an HP ze2000z laptop.
Read a post that recommended repairing AVAST, but when I click Change/Remove, a window flashes open and closed so fast I cannot read it or get it to stay open long enough to repair (or uninstall for a reinstall).
When you updated from avast 4.6 the content of avast.setup will also have been updated and this change will have been detected by ZA and it will almost certainly asked for permission again. If you were a little quick in blocking and didn’t realise what it was and that would effectively block avast updates.
An avast repair in this case wouldn’t have had any effect as it was the firewall blocking, although why the change remove button didn’t work is a mystery to me too.