First try restarting your computer. If that doesn't help, delete the patch files (mine are in Documents\My Games\FINAL FANTASY XIV - A Realm REborn\downloads\ffxivpatch - they're automatically deleted when they're actually applied, so this should just be the corrupt portion of the 1.5 GB you have to go. If that still doesn't work, there are the official recommendations here, such as they are: http://support.na.square-enix.com/fa...67515&ret=main