I tried to install Sophos, but can't get beyond step 1 (how pathetic). I see, and can open 'Before you install', but 'Sophos antivirus home edition.mkpg' shows as a blank sheet - not as shown in the installation video. When I click it, it says there is no default application for opening it.
I've tried re-starting - no joy. I'm using Mac OS X 10.4.11.
Any suggestions?
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