I have just been getting this the past 2/3 days and it has literally made me stop playing as it happens within about 10 minutes of me logging on, Im able to move, summon my carbuncle and then head off to my quest point and BOOM my sound suddenly goes, my cursor turns into the normal arrow key and then it closes and it is getting on my wits end as I simply can not play the game at all as I never had the error before then.

Might just have to suck it up and fix my PS3 to play the game and restart it on there if they dont get this error and its only on PC..