0x8004fe21 error: yet another case :(

I reinstalled Windows 7 Ultimate x64 on my Dell xps15 laptop after got an SSD. It was an Dell OEM version from the backup disk. Did this before and never got this problem. This is what I have done so far:

1. First it always says Genuine Windows when I check the bottom corner of the control panel->system;
2. Followed one instruction by removing the tokens.dat file and reactivated windows. It was successful but still got 0x8004fe21 after restart;
3. Tried the following link Noel posted in another thread (yes I have read many Noel's posts :))
Genuine Microsoft Software
No problem. Activation was successful;
4. I checked and I don't seem to have KB3004394 installed. However I do remember after this reinstall I got an windows update error and google search told me it was caused by some root certificate update. I uninstalled it and was then able to update the rest of the updates. Windows prompted me to update the same root certificate update and I did it (maybe I shouldn't do this??)

Here is the output from MGADiag. Thank you so much for all your help!

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: {F263C76C-5F0C-4D1F-BF02-1921B1442E01}(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: 7601.win7sp1_gdr.140303-2144
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-->

Other data-->
Office Details: <GenuineResults><MachineData><UGUID>{F263C76C-5F0C-4D1F-BF02-1921B1442E01}</UGUID><Version>1.9.0027.0</Version><OS>6.1.7601.2.00010100.1.0.001</OS><Architecture>x64</Architecture><PKey>*****-*****-*****-*****-P4K27</PKey><PID>00426-OEM-8992662-00400</PID><PIDType>2</PIDType><SID>S-1-5-21-584796801-613715246-1036415954</SID><SYSTEM><Manufacturer>Dell Inc.         </Manufacturer><Model>Dell System XPS L502X</Model></SYSTEM><BIOS><Manufacturer>Dell Inc.         </Manufacturer><Version>A12</Version><SMBIOSVersion major="2" minor="6"/><Date>20120907000000.000000+000</Date></BIOS><HWID>F15C3207018400FE</HWID><UserLCID>0409</UserLCID><SystemLCID>0409</SystemLCID><TimeZone>Central Standard Time(GMT-06:00)</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>109</Result><Products/><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: 00426-00178-926-600400-02-1033-7601.0000-3452014
Installation ID: 015514947682511060173063449835658890041221306436737721
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: 12/12/2014 6:59:53 PM

Windows Activation Technologies-->
HrOffline: 0x00000000
HrOnline: 0x00000000
HealthStatus: 0x0000000000000000
Event Time Stamp: 12:10:2014 21:20
ActiveX: Registered, Version: 7.1.7600.16395
Admin Service: Registered, Version: 7.1.7600.16395
HealthStatus Bitmask Output:


HWID Data-->
HWID Hash Current: MAAAAAEAAQABAAIAAAACAAAAAgABAAEAonZqfq6FFD3gWvApKD+gg/ThHPt8di5z

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            DELL          QA09   
  FACP            DELL          QA09   
  HPET            DELL          QA09   
  MCFG            DELL          QA09   
  SLIC            DELL          QA09   
  SSDT            DELL          PtidDevc
  ASF!            DELL          QA09   
  SSDT            DELL          PtidDevc
  SSDT            DELL          PtidDevc
  SSDT            DELL          PtidDevc
  UEFI            DELL          QA09   
  UEFI            DELL          QA09   
  UEFI            DELL          QA09