I installed the version 9,the UI is simply Horrible!!! Along with Windows 8 Avast have now a horrible UI!
I had some trouble installing it with Outpost firewall pro 8.1.1. Outpost didn't allow Avast to update even when I specified it to allow all Avast services to access internet.
So I make a downgrade to Avast 8.
Very disappointed....
I have used avast and outpost firewall for over nine years without major issue. I'm on the latest versions of both programs on win XP Pro and win7 32 bit and no problem on either system.
What elements of Outpost Firewall Pro (OFP) are you using ?
e.g. Did you elect to use the OFP Web Protect as it isn't really required with avast ?
This is OFP stopping changed/updated avast elements (and blocking changed elements) as the firewall is setup to do, nothing avast can do about that. This is an OFP issue, you need to have OFP allow
avast.setup instup.exe for updates to take place (and the other new/changed elements of avast), if the entry is there then delete it and that should force OFP to ask permission again.
Or better still delete all entries for avast elements in OFP and put OFP on to Auto-learn mode for a few days whilst you use the updated avast.
EDIT: new avast update file name in avast 9 - instup.exe