Dayz Crashed and lost character. Closed duplicate has this exact situation.

Here is the Event log for the crash.

Log Name: Application
Source: Application Error
Date: 2/1/2014 12:14:54 PM
Event ID: 1000
Task Category: (100)
Level: Error
Keywords: Classic
User: N/A
Computer: WATER
Description:
Faulting application name: DayZ.exe, version: 0.32.114.557, time stamp: 0x52e0221e
Faulting module name: DayZ.exe, version: 0.32.114.557, time stamp: 0x52e0221e
Exception code: 0xc0000005
Fault offset: 0x001c121e
Faulting process id: 0x7c0
Faulting application start time: 0x01cf1f79138909a5
Faulting application path: D:\Games\Steam\steamapps\common\DayZ\DayZ.exe
Faulting module path: D:\Games\Steam\steamapps\common\DayZ\DayZ.exe
Report Id: 831100c4-8b7d-11e3-be9b-5404a628d789
Faulting package full name:
Faulting package-relative application ID: