BSOD and multiple crashes on first startup

My computer has been crashing on first startup for the last few months. I've done a bit of digging but I can't seem to find the problem. SF file attached and this is the message I got this time. It's not always the same Blue Screen message and the minidump sometimes stalls.

Problem signature:
Problem Event Name: BlueScreen
OS Version: 6.1.7601.2.1.0.256.1
Locale ID: 6153

Additional information about the problem:
BCCode: 7f
BCP1: 00000008
BCP2: 80DC9750
BCP3: 00000000
BCP4: 00000000
OS Version: 6_1_7601
Service Pack: 1_0
Product: 256_1

Files that help describe the problem:
C:\Windows\Minidump\071813-19593-01.dmp
C:\Users\Leo\AppData\Local\Temp\WER-42588-0.sysdata.xml

Read our privacy statement online:
Windows 7 Privacy Statement - Microsoft Windows

If the online privacy statement is not available, please read our privacy statement offline:
C:\Windows\system32\en-US\erofflps.txt


I suspect the power supply but I don't know.

Code:

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

Validation Code: 0
Cached Online Validation Code: N/A, hr = 0xc004f012
Windows Product Key: *****-*****-X92GV-V7DCV-P4K27
Windows Product Key Hash: aU2z1/fnhnLHmhBm699qYZT2E6s=
Windows Product ID: 00426-OEM-8992662-00400
Windows Product ID Type: 2
Windows License Type: OEM SLP
Windows OS version: 6.1.7601.2.00010100.1.0.001
ID: {5369F9B0-C555-49AB-AA28-6C6D3DD736F3}(1)
Is Admin: Yes
TestCab: 0x0
LegitcheckControl ActiveX: N/A, hr = 0x80070002
Signed By: N/A, hr = 0x80070002
Product Name: Windows 7 Ultimate
Architecture: 0x00000000
Build lab: 7601.win7sp1_gdr.130505-1534
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: 100 Genuine
Microsoft Office Excel 2007 - 100 Genuine
Microsoft Office PowerPoint 2007 - 100 Genuine
Microsoft Office Word 2007 - 100 Genuine
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_E2AD56EA-765-d003_E2AD56EA-766-0_E2AD56EA-134-80004005_E2AD56EA-765-d003_E2AD56EA-766-0_E2AD56EA-134-80004005_E2AD56EA-765-d003_E2AD56EA-766-0_E2AD56EA-134-80004005

Browser Data-->
Proxy settings: N/A
User Agent: Mozilla/4.0 (compatible; MSIE 8.0; Win32)
Default Browser: C:\Program Files\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-->

Other data-->
Office Details: <GenuineResults><MachineData><UGUID>{5369F9B0-C555-49AB-AA28-6C6D3DD736F3}</UGUID><Version>1.9.0027.0</Version><OS>6.1.7601.2.00010100.1.0.001</OS><Architecture>x32</Architecture><PKey>*****-*****-*****-*****-P4K27</PKey><PID>00426-OEM-8992662-00400</PID><PIDType>2</PIDType><SID>S-1-5-21-2546849142-702932552-200227101</SID><SYSTEM><Manufacturer>ECS</Manufacturer><Model>G31T-M7</Model></SYSTEM><BIOS><Manufacturer>American Megatrends Inc.</Manufacturer><Version>080014 </Version><SMBIOSVersion major="2" minor="5"/><Date>20080731000000.000000+000</Date></BIOS><HWID>51593307018400F8</HWID><UserLCID>1809</UserLCID><SystemLCID>0409</SystemLCID><TimeZone>Korea Standard Time(GMT+09:00)</TimeZone><iJoin>0</iJoin><SBID><stat>3</stat><msppid></msppid><name></name><model></model></SBID><OEM><OEMID>DELL  </OEMID><OEMTableID>QA09   </OEMTableID></OEM><GANotification/></MachineData><Software><Office><Result>100</Result><Products><Product GUID="{90120000-0016-0000-0000-0000000FF1CE}"><LegitResult>100</LegitResult><Name>Microsoft Office Excel 2007</Name><Ver>12</Ver><Val>3AB862DE70D8D86</Val><Hash>UfpXsJvSSVcPufbDdjd0NK73+ug=</Hash><Pid>89385-707-4159871-63833</Pid><PidType>14</PidType></Product><Product GUID="{90120000-0018-0000-0000-0000000FF1CE}"><LegitResult>100</LegitResult><Name>Microsoft Office PowerPoint 2007</Name><Ver>12</Ver><Val>3AB862DE70D8D86</Val><Hash>UfpXsJvSSVcPufbDdjd0NK73+ug=</Hash><Pid>89400-707-4159871-63475</Pid><PidType>14</PidType></Product><Product GUID="{90120000-001B-0000-0000-0000000FF1CE}"><LegitResult>100</LegitResult><Name>Microsoft Office Word 2007</Name><Ver>12</Ver><Val>3AB862DE70D8D86</Val><Hash>UfpXsJvSSVcPufbDdjd0NK73+ug=</Hash><Pid>89407-707-4159871-63993</Pid><PidType>14</PidType></Product></Products><Applications><App Id="16" Version="12" Result="100"/><App Id="18" Version="12" Result="100"/><App Id="1B" Version="12" Result="100"/></Applications></Office></Software></GenuineResults>  

Spsys.log Content: 0x80070002

Licensing Data-->
Software licensing service version: 6.1.7601.17514

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: 00426-00178-926-600400-02-6153-7600.0000-2922010
Installation ID: 020201494480473391456240996396679504773981206665587460
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: P4K27
License Status: Licensed
Remaining Windows rearm count: 3
Trusted time: 18/07/2013 16:46:22

Windows Activation Technologies-->
HrOffline: 0x00000000
HrOnline: N/A
HealthStatus: 0x0000000000000000
Event Time Stamp: N/A
ActiveX: Registered, Version: 7.1.7600.16395
Admin Service: Not Registered - 0x80070422
HealthStatus Bitmask Output:


HWID Data-->
HWID Hash Current: NAAAAAEABAABAAEAAAABAAAAAwABAAEAJJTm1nLNvkvaZ6p2SOTMH8T87sOwZhh4ig9Gyg==

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            073108        APIC1329
  FACP            073108        FACP1329
  HPET            073108        OEMHPET 
  MCFG            073108        OEMMCFG 
  OEMB            073108        OEMB1329
  GSCI            073108        GMCHSCI 
  SSDT            DpgPmm        CpuPm
  SLIC            DELL          QA09

Hello,
Months ago i posted here the same problem as yours (not exactly the same of course), the description you posted are somewhat the same as mine before.
> I did alot of checking wasted time, but thanks to those who advise me to have a memory check, there is a tutorial here on how to make an extensive memory check (simply you have to look for it).
> Simply resitting the memory did the job for me.
> And also try to check the connections maybe loose or something might help.