Another problem with Windows Update and Windows Office 2007

I'm running Vista Home Deluxe on an HPa6300f plain vanilla desktop, with AVG 8.5 protection.
I've turned the firewall off&on. When it's off, Windows Firewall is on, and vice versa, to no effect.

Windows Update repeatedly attempts to install Security Updates for Office 2003. I have Office 2007, which it does not try to update.

Included in with the 2003 stuff is "security update for Microsoft Office Web Components (KB947319)", also not installed.

The error code for this is the inscrutable 80070666.

I've read previous posts, and the excellent bleeping computer dot com explanation of Windows Update, but I'm still left with the original problem, plus one basic one. How do you "hide" downloads? Meanwhile, this:
1) How do I get the updates I need (Office 2007)?
2) Other than "hiding" them, how can I stop the updates I don't need (Office 2003)?

Any help will be greatly appreciated.
Thanks,
- Paul