Same problem here.
Game played perfectly for 2 days, then I had a problem last night ( cant start up the game), so I uninstalled it then reinstalled again.
Now Im having problem with patching.
"414:0 DWonline.bin Error. A problem occurred during the update. Update is incomplete."
HELP. Right when the game's getting good ...
Man, try to restore ur system earlier. Something might have corrupted a file. Try that and come back to post the result. So: restore your system earlier, a way earlier I suggest, then try to install the game from zero.