Fix or tip for sudden repeat crashes

[Murugan]

In the last 24 hours I am suddenly experiencing repeated crashes

Platform: Windows 7
ISP: Comcast
Type of Internet Connection: Cable
Internet Connection Speed: 22Mbps/5Mbps
Date & Time: Between midnight-4 am PST
Frequency: Random/often (every 30 min-1 hour)
Character Name: Murugan Raj
Race: Hyur
World: Selbina
Class/Skill Rank: Gladiator/36

Physical Level: 50
Area and Coordinates: Camp Iron Lake (26,12)
Party or Solo: Party
Monster Name: Young Raptor
Steps:

1. When pulling or running towards a mob.
2. When sending a tell.
3. After engaging mob

What are a some steps I can take when this happens to rule out typical problems that might cause this. I don't know of anyway to have the patcher verify the game files, but I cycled my modem, restarted my computer, and checked my memory usage to make sure there was no problem there.