BSOD random crashes

BSOD happens quite randomly, sometimes when I exit some gay, such as deus ex, or when I'm surfing on the net while using a browser. Quite frequently it happened when, I'd extended my display using HDMI and another monitor.

Please Help.

Thank you for your reply, here is the report:

Code:

Diagnostic Report (1.9.0027.0):
-----------------------------------------
Windows Validation Data-->

Validation Code: 0
Cached Online Validation Code: N/A, hr = 0xc004f012
Windows Product Key: *****-*****-Q6MMK-KYK6X-VKM6G
Windows Product Key Hash: 289NoAWl2ZoVfuieux/315WkDIc=
Windows Product ID: 00426-OEM-8992662-00173
Windows Product ID Type: 2
Windows License Type: OEM SLP
Windows OS version: 6.1.7600.2.00010100.0.0.001
ID: {A5C035FD-C0DD-4DFA-80B1-C0905496463B}(1)
Is Admin: Yes
TestCab: 0x0
LegitcheckControl ActiveX: N/A, hr = 0x80070002
Signed By: N/A, hr = 0x80070002
Product Name: Windows 7 Ultimate
Architecture: 0x00000009
Build lab: 7600.win7_gdr.130318-1532
TTS Error: 
Validation Diagnostic: 
Resolution Status: N/A

Vista WgaER Data-->
ThreatID(s): N/A, hr = 0x80070002
Version: N/A, hr = 0x80070002

Windows XP Notifications Data-->
Cached Result: N/A, hr = 0x80070002
File Exists: No
Version: N/A, hr = 0x80070002
WgaTray.exe Signed By: N/A, hr = 0x80070002
WgaLogon.dll Signed By: N/A, hr = 0x80070002

OGA Notifications Data-->
Cached Result: N/A, hr = 0x80070002
Version: N/A, hr = 0x80070002
OGAExec.exe Signed By: N/A, hr = 0x80070002
OGAAddin.dll Signed By: N/A, hr = 0x80070002

OGA Data-->
Office Status: 109 N/A
OGA Version: N/A, 0x80070002
Signed By: N/A, hr = 0x80070002
Office Diagnostics: 025D1FF3-364-80041010_025D1FF3-229-80041010_025D1FF3-230-1_025D1FF3-517-80040154_025D1FF3-237-80040154_025D1FF3-238-2_025D1FF3-244-80070002_025D1FF3-258-3

Browser Data-->
Proxy settings: N/A
User Agent: Mozilla/4.0 (compatible; MSIE 8.0; Win32)
Default Browser: C:\Program Files (x86)\Mozilla Firefox\firefox.exe
Download signed ActiveX controls: Prompt
Download unsigned ActiveX controls: Disabled
Run ActiveX controls and plug-ins: Allowed
Initialize and script ActiveX controls not marked as safe: Disabled
Allow scripting of Internet Explorer Webbrowser control: Disabled
Active scripting: Allowed
Script ActiveX controls marked as safe for scripting: Allowed

File Scan Data-->
File Mismatch: C:\Windows\system32\wat\watadminsvc.exe[Hr = 0x80070003]
File Mismatch: C:\Windows\system32\wat\npwatweb.dll[Hr = 0x80070003]
File Mismatch: C:\Windows\system32\wat\watux.exe[Hr = 0x80070003]
File Mismatch: C:\Windows\system32\wat\watweb.dll[Hr = 0x80070003]

Other data-->
Office Details: <GenuineResults><MachineData><UGUID>{A5C035FD-C0DD-4DFA-80B1-C0905496463B}</UGUID><Version>1.9.0027.0</Version><OS>6.1.7600.2.00010100.0.0.001</OS><Architecture>x64</Architecture><PKey>*****-*****-*****-*****-VKM6G</PKey><PID>00426-OEM-8992662-00173</PID><PIDType>2</PIDType><SID>S-1-5-21-1967244112-857268679-2359016580</SID><SYSTEM><Manufacturer>To Be Filled By O.E.M.</Manufacturer><Model>To Be Filled By O.E.M.</Model></SYSTEM><BIOS><Manufacturer>American Megatrends Inc.</Manufacturer><Version>P1.90</Version><SMBIOSVersion major="2" minor="6"/><Date>20120711000000.000000+000</Date></BIOS><HWID>62B93607018400FC</HWID><UserLCID>0409</UserLCID><SystemLCID>0409</SystemLCID><TimeZone>FLE Standard Time(GMT+02:00)</TimeZone><iJoin>0</iJoin><SBID><stat>3</stat><msppid></msppid><name></name><model></model></SBID><OEM><OEMID>_ASUS_</OEMID><OEMTableID>Notebook</OEMTableID></OEM><GANotification/></MachineData><Software><Office><Result>109</Result><Products/><Applications/></Office></Software></GenuineResults>  

Spsys.log Content: 0x80070002

Licensing Data-->
Software licensing service version: 6.1.7600.16385

Name: Windows(R) 7, Ultimate edition
Description: Windows Operating System - Windows(R) 7, OEM_SLP channel
Activation ID: 7cfd4696-69a9-4af7-af36-ff3d12b6b6c8
Application ID: 55c92734-d682-4d71-983e-d6ec3f16059f
Extended PID: 00426-00178-926-600173-02-1033-7600.0000-1172013
Installation ID: 005410689816063216154103789442103592464145447016692075
Processor Certificate URL: http://go.microsoft.com/fwlink/?LinkID=88338
Machine Certificate URL: http://go.microsoft.com/fwlink/?LinkID=88339
Use License URL: http://go.microsoft.com/fwlink/?LinkID=88341
Product Key Certificate URL: http://go.microsoft.com/fwlink/?LinkID=88340
Partial Product Key: VKM6G
License Status: Licensed
Remaining Windows rearm count: 3
Trusted time: 9/5/2013 3:05:19 PM

Windows Activation Technologies-->
HrOffline: 0x00000000
HrOnline: N/A
HealthStatus: 0x0000000000000000
Event Time Stamp: N/A
ActiveX: Not Registered - 0x80040154
Admin Service: Not Registered - 0x80040154
HealthStatus Bitmask Output:


HWID Data-->
HWID Hash Current: OgAAAAQABAABAAEAAAACAAAAAgABAAEACrYmUa8MdxYJ57zTVPLACBpIEDMkhOKVYj3ogv7Wap0gIQ==

OEM Activation 1.0 Data-->
N/A

OEM Activation 2.0 Data-->
BIOS valid for OA 2.0: yes
Windows marker version: 0x20001
OEMID and OEMTableID Consistent: yes
BIOS Information: 
  ACPI Table Name    OEMID Value    OEMTableID Value
  APIC            ALASKA        A M I
  FACP            ALASKA        A M I
  HPET            ALASKA        A M I
  MCFG            ALASKA        A M I
  AAFT            ALASKA        OEMAAFT 
  SSDT            AMD           POWERNOW
  SLIC            _ASUS_        Notebook

NoelDP said:

Your installation is counterfeit - an ASUS OEM_SLP Product Key on a Retail motherboard.

You need to reformat and reinstall using genuine media.

Not quite correct, I've used side software to set asus logo into my system window. It's minor customization that has nothing to do with the BSOD, moreover the BSOD i've been getting were long before I decided to customize my system window.