game suddenly drops Frames

The game slows down to like 1 frame per sec then errors out and this is the error detail. Says Final fantasy had a error -1

Problem signature:
Problem Event Name: APPCRASH
Application Name: ffxiv.exe
Application Version: 1.0.0.0
Application Timestamp: 521be282
Fault Module Name: ffxiv.exe
Fault Module Version: 1.0.0.0
Fault Module Timestamp: 521be282
Exception Code: 40000015
Exception Offset: 0085e911
OS Version: 6.1.7601.2.1.0.256.48
Locale ID: 1033
Additional Information 1: 3a5a
Additional Information 2: 3a5ac0e181e4a15cafe2e9e533f213f9
Additional Information 3: 3c03
Additional Information 4: 3c038146ed8ea17194e20c3f523b6528