Instructions
Open the Control Panel and select "Uninstall a program."
Wait for the window to pop up and to fill with a list of programs -- it may take a few minutes. Find Aion, and click "Uninstall."
Navigate to the Aion website, click the "Aion Account" button located at the top of the site, and select the "Download Client" option.
Reinstall Aion and allow it to patch. This will completely replace every file in the game, correcting the 1024 error.