Sudden crashes when doing normal activities like selling items or summoning retainers

ISP: Time Warner Cable

Type of Internet Connection: Cable

Internet Connection Speed: 200mbps

Date & Time: 11am PST

Frequency: Sometimes

World: Leviathan

Character Name: Garu Dyne

Retainer Name: Photo

NPC Name: Also with NPC, Syneyhil

Monster Name: None.

Class/Level: SCH/60.

Party or Solo: Solo.

Race: Lalafell M.

In-Game Time: 12pm Eorzean.

Area and Coordinates: Limsa Lominsa Lower Decks, 8,11.

Housing: None.

Steps:

For the first crash...
1) Summon retainer
2) Screen freezes
3) Client crashes.
4) Relogged back in.

For the second crash...
1) Went to NPC to sell Allagan pieces.
2) Sold Allagan pieces.
3) Immediately as they were sold, client crashed.
4) Relogged back in