Error Update - Repository Change

[stevef]

This indicates that repositories you are using have changed or added information concerning their software.
These changes can occur but the update/upgrade process requires indication from the user that these changes are OK.

Try opening a terminal by pressing 'Ctrl' 'Alt' and 'T' together and in the terminal window type or paste in this command

Code:

sudo apt-get --allow-releaseinfo-change update

This allows the update process to accept the changes - you will need to enter your password.
Once this command has been run, please retry the update/upgrade.