Windows 7 PC
Time: 1:20 A.M. EST
Frequency: twice in a row so far
World name: Hyperion
Character name: Valkyrion Stormguard
NPC name: retainer summoning bell
Monster name: --
Class/Level: Arcanist 27
Party or solo: solo
In-game time:
Area and coordinates: Ul'dah Inn Room
Steps:
1. clicked summoning bell inside inn room to check on retainer(s)
2. was getting gil off retainer using keyboard
3. tried clicking withdrawal and game stopped responding all together
4. had to use CTRL+ALT+DEL in order to close game and reboot

Connection Specs
I use a wireless internet connection that has worked fine for years, including all of 1.0
PC specs I'm not sure of