MatriiX,
You can try to validate the integrity of game files by right clicking DayZ within steam and going to properties.
On the new window that opens within Steam goto the Local Files tab and click Verify integrity of game.

That resolved it today after Eugene said on twitter a new client side update was rolling out. I tried this fix previously and it hadnt worked. Good luck.

Jstewart,
Just an update to this ticket. I saw that Eugene had posted on twitter about an incoming client side patch. I verified game cache and the issue seems to be fixed. Thanks for the help and you can close the ticket.

JStewart,
I have uploaded both, the Dxdiag as well as the appdata folder to AppData_Dayz_Contents1.7z. I 7zipped it as it was over the size limit. Please let me know if there is anything else needed.

Timestamp was as of 2/19/2015 at 2:43pm Eastern Time (USA)

Jstewart,
The only other thing I can add to this is that a friend has size on disk: 9,121,304,576 bytes of data contained in "<Install Drive>:\Program Files (x86)\Steam\SteamApps\common\DayZ" where as I have 9,201,242,112 bytes.

Reading through some other fixes, I tried to run DayZ from the D:\Program Files (x86)\Steam\SteamApps\common\DayZ folder and received a "DayZ has stopped working" error. Problem details when expanded on are:

Problem signature:

Problem Event Name:	APPCRASH
Application Name:	DayZ.exe
Application Version:	0.53.126.384
Application Timestamp:	54cf7e9b
Fault Module Name:	DayZ.exe
Fault Module Version:	0.53.126.384
Fault Module Timestamp:	54cf7e9b
Exception Code:	c0000005
Exception Offset:	008f2ea6
OS Version:	6.1.7601.2.1.0.256.4
Locale ID:	1033
Additional Information 1:	0a9e
Additional Information 2:	0a9e372d3b4ad19135b953a78882e789
Additional Information 3:	0a9e
Additional Information 4:	0a9e372d3b4ad19135b953a78882e789

Jstewart,
I have uploaded the .rpt file that I have that was located in "C:\Users\<username>\AppData\Local\DayZ"

Windows Event Log Details Continued:

Fault bucket , type 0
Event Name: APPCRASH
Response: Not available
Cab Id: 0

Problem signature:
P1: DayZ.exe
P2: 0.53.126.384
P3: 54cf7e9b
P4: DayZ.exe
P5: 0.53.126.384
P6: 54cf7e9b
P7: c0000005
P8: 008f2ea6
P9:
P10:

Attached files:

These files may be available here:
C:\Users\****\AppData\Local\Microsoft\Windows\WER\ReportArchive\AppCrash_DayZ.exe_6637cf8736b78c1b613d1c841331b5b8522d5d_01dfc0a0

Analysis symbol:
Rechecking for solution: 0
Report Id: b71da9f4-b86f-11e4-a1ed-f01faf61a771
Report Status: 0

Windows Event Log Details:

Faulting application name: DayZ.exe, version: 0.53.126.384, time stamp: 0x54cf7e9b
Faulting module name: DayZ.exe, version: 0.53.126.384, time stamp: 0x54cf7e9b
Exception code: 0xc0000005
Fault offset: 0x008f2ea6
Faulting process id: 0xe38
Faulting application start time: 0x01d04c7c7927d059
Faulting application path: D:\Program Files (x86)\Steam\SteamApps\common\DayZ\DayZ.exe
Faulting module path: D:\Program Files (x86)\Steam\SteamApps\common\DayZ\DayZ.exe
Report Id: b71da9f4-b86f-11e4-a1ed-f01faf61a771