Most of the errors can be found at Apple's Knowledge Base. This happens if you edited the hosts file (Saurik's Server) or you are using Tiny Umbrella.
Here is a list of i Tunes errors that could appear during a restore or a USB connection via i Tunes: This error happens if you are logged out, try to download something from the i Tunes Store and if you click on "Download" and enter an account, which doesn't have this article, this error will occur. Use Tiny Umbrella and "Kick Device Out Of Recovery" to boot.
You should see a notification once the update is downloaded successfully and ready for installation.
At this moment, go to Settings Software Update and then tap Install Now to begin installing the new update.
However, he has said that they will try to release a new version of evasi0n7 for i OS 7.0.6 as the security fix appears to be critical.