Can't even login : Final Fantasy has stopped working as soon as I try to login.

Title says it all. I can't even login now. It was working fine last night, and I haven't made any changes to my computer. Now I can't get in at all.

directly from one of the many errors caused by this game in the windows log:
Faulting application name: ffxiv.exe, version: 1.0.0.0, time stamp: 0x529464f3
Faulting module name: ffxiv.exe, version: 1.0.0.0, time stamp: 0x529464f3
Exception code: 0xc0000005
Fault offset: 0x0086b57b
Faulting process id: 0x950
Faulting application start time: 0x01ceee4ff60e8836
Faulting application path: C:\Program Files (x86)\SquareEnix\FINAL FANTASY XIV - A Realm Reborn\game\ffxiv.exe
Faulting module path: C:\Program Files (x86)\SquareEnix\FINAL FANTASY XIV - A Realm Reborn\game\ffxiv.exe
Report Id: 43cbeb78-5a43-11e3-8b36-902b34d498b2

WTF is going on now?

If you recently updated the client, it's been corrupted. Generic memory access violation. Reinstall FFXI. Could also be bad RAM, bad CPU, or bad sectors on the HDD. The error is so generic and vague it is virtually impossible to tell exactly what the cause is without extensive debug logging taking place. Good luck.

It seems that there have not been any further posts about this concern being an ongoing issue. Because of this, we are considering it to be resolved. If this does continue to be a concern, please create another thread to further discuss resolutions or contact the Support Center at support.na.square-enix.com for assistance.

- Furlamseere