It has been blocked by avast, so you shouldn't have to do anything more.
However, the XP firewall should have intercepted this to start with, why it didn't (and avast did) I don't know.But I would suggest that you consider another firewall as the XP one has no outbound protection.
Many forum users are using these:
- PC Tools Firewall seems to have the least user headaches as it doesn't seem to be constantly asking the user questions about this and that.
- Online Armor for the most parts fine but it has caused some users grief after avast program updates and that is something you have to watch out for.
- Outpost Firewall 6.5.1 free, a cut down version of the Outpost Firewall Pro version, which should still provide good protection,
http://free.agnitum.com/. Download,
http://www.filehippo.com/download_outpost_firewall/ and also PrivateFirewall,
http://www.privacyware.com/personal_firewall.htmlI don't know what language support these firewalls might have.