iTunes: "Error 42408" or "Error 42404" after upgrading to iTunes 9.0.3

Products Affected

iTunes 9, iTunes Store

Symptoms

After updating to iTunes 9.0.3, when you try to download an item from the iTunes Store or authenticate purchases, you may see an alert stating "Error 42408" or "Error 42404."

Resolution

Update to the latest version of iTunes.

iTunes 9.1 and later should resolve this issue. You can download the latest version of iTunes here.

This document will be updated as more information becomes available.
Not helpful Somewhat helpful Helpful Very helpful Solved my problem