I've never had that happen to me (missing programs) after installing, or installing an upgrade. Be sure Spybot "resident protection and tea timer" are disabled. Zone alarm will make changes to your registry while installing. Any purely antivirus programs shouldn't interfere with installing ZA, but any other firewall/real time type of computer protection programs might affect it (the install)
I'm going to stop replying joe mc, I feel like I'm stepping on usasma's toe's here. He made an offer to walk you through the install and I've been butting in on his offer.
Very sorry usasma,
it won't be happening anymore. Carry on without interruption from me.