"This page has an unspecified potential security risk"

I have recently developed this annoyance concerning restoring zip files from VSS on my Vista x64 SP1 Box. When I right-click on any zip file within a VSS share I get the message "This page has an unspecified potential security Would you like to continue?". It only does this with zips. What caused this and is there a fix?

Thanks in advance

You can try this, good luck!

Windows Fixes: Windows XP Problem: "Your current security settings do not allow this action"