Have had the account set up on my pc for weeks now with no issues. Installed and played the new expansion since the beginning of the week. Even played last night with no issues.
Tonight, after the patch, however, different story. After patching it ran an image check then blew off with a "cohupdater.exe has encountered a problem and needs to close. We are sorry for the inconvenience." Then it immediately closes down.
I have sent an email off to support but please post a solution if one is presented to you by NCSOFT.
I definitely don't want to go the reinstall route unless absolutely necessary.