Downloading problem

I am getting a message that I don’t know how to deal with: Last encountered error Can’t select any server for downloading (from 0) Totaltime 19s

I am running IE and XP and have never seen this message before, I checked my firewall and avast is not blocked.
Unfortunately I do not have the knowledge of how to deal with these issues and am asking for advice.

The servers.def file would appear to be corrupt or 0KB, C:\Program Files\Alwil Software\Avast4\Setup\servers.def

You can try and download the servers.def file, instructions and location in this post http://forum.avast.com/index.php?topic=504.msg169873#msg169873.

Or delete the servers.def file and try a manual update, it should download another copy.