1. The warning about Zone Alarm relates to the Pro version and the Privacy Controls see this for more information
http://www.avast.com/eng/webshield_issues.html.
2. As far as I'm aware (not being an Outlook user) avast can't extract the email from within a .pst (database) file and potentially the only option for avast would be to delete the infected file backups.pst which you really don't want. Knowing the email location ...\backup.pst\Personal Folders\Top of Personal Folders\Junk E-mail\Nicholas\Wynefreed.zip\1.exe you could either clear the Junk E-Mail folder or navigate further to locate the infected email and manually delete it and then clear the deleted emails folder.
