Windows 7 build 7601, Not genuine

Hi so I got a new computer about a month ago, no problems untill out of nowhere my background changed to a black screen with "Windows 7 build 7601 This copy of windows is not genuine"
Now I have no idea what to do...

Code:

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

Validation Code: 50
Cached Online Validation Code: 0x0
Windows Product Key: *****-*****-BJD6C-K3YVH-DVQJG
Windows Product Key Hash: WFqPPaNJ0hrc3E/8MgITJa2Xf0M=
Windows Product ID: 00359-OEM-8992687-00118
Windows Product ID Type: 2
Windows License Type: OEM SLP
Windows OS version: 6.1.7601.2.00010300.1.0.003
ID: {65B82726-0C10-42EA-9F26-FC4B67C1D3E0}(1)
Is Admin: Yes
TestCab: 0x0
LegitcheckControl ActiveX: N/A, hr = 0x80070002
Signed By: N/A, hr = 0x80070002
Product Name: Windows 7 Home Premium
Architecture: 0x00000009
Build lab: 7601.win7sp1_gdr.120830-0333
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)\Google\Chrome\Application\chrome.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>{65B82726-0C10-42EA-9F26-FC4B67C1D3E0}</UGUID><Version>1.9.0027.0</Version><OS>6.1.7601.2.00010300.1.0.003</OS><Architecture>x64</Architecture><PKey>*****-*****-*****-*****-DVQJG</PKey><PID>00359-OEM-8992687-00118</PID><PIDType>2</PIDType><SID>S-1-5-21-367369891-1428305009-3573633999</SID><SYSTEM><Manufacturer>MSI</Manufacturer><Model>MS-7641</Model></SYSTEM><BIOS><Manufacturer>American Megatrends Inc.</Manufacturer><Version>V17.9</Version><SMBIOSVersion major="2" minor="6"/><Date>20120323000000.000000+000</Date></BIOS><HWID>4DB43C07018400FC</HWID><UserLCID>0809</UserLCID><SystemLCID>0409</SystemLCID><TimeZone>GMT Standard Time(GMT+00:00)</TimeZone><iJoin>0</iJoin><SBID><stat>3</stat><msppid></msppid><name></name><model></model></SBID><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, HomePremium edition
Description: Windows Operating System - Windows(R) 7, OEM_SLP channel
Activation ID: d2c04e90-c3dd-4260-b0f3-f845f5d27d64
Application ID: 55c92734-d682-4d71-983e-d6ec3f16059f
Extended PID: 00359-00178-926-800118-02-2057-7601.0000-3132012
Installation ID: 002393891604994864521591557413919171764666655070024012
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: DVQJG
License Status: Notification
Notification Reason: 0xC004F063.
Remaining Windows rearm count: 3
Trusted time: 08/11/2012 16:29:12

Windows Activation Technologies-->
HrOffline: 0x00000000
HrOnline: 0xC004C533
HealthStatus: 0x0000000000000000
Event Time Stamp: 11:8:2012 15:46
ActiveX: Registered, Version: 7.1.7600.16395
Admin Service: Registered, Version: 7.1.7600.16395
HealthStatus Bitmask Output:


HWID Data-->
HWID Hash Current: MgAAAAEABAABAAEAAAABAAAAAgABAAEAHKIcuOItEDMYmZigVPJYNgCsULCcY3YNFA8=

OEM Activation 1.0 Data-->
N/A

OEM Activation 2.0 Data-->
BIOS valid for OA 2.0: yes, but no SLIC table
Windows marker version: N/A
OEMID and OEMTableID Consistent: N/A
BIOS Information: 
  ACPI Table Name	OEMID Value	OEMTableID Value
  APIC			7641MS		A7641100
  FACP			7641MS		A7641100
  HPET			7641MS		OEMHPET 
  MCFG			7641MS		OEMMCFG 
  OEMB			7641MS		A7641100
  SSDT			A M I 		POWERNOW

You need to ensure that you have a unqiue and valid product key, you can enter it via the System Control panel and click on 'Change Product Key'. More information see Protect Yourself from Piracy

I got my PC from ebay. I don't think its second hand, but It did come with a COA sticker however I was unable to find a product key anywhere in my packaging.
I did try searching for a fix before posting here so i "may" have done something i probibly shouldn't have"

The CoA sticker just says "You are required to affix this Certificate of authenticity to the exterior of the PC"
No 25 character key or anything.

Mattino you can use these commands:
Open command prompt (admin mode)
type-- slmgr.vbs /rilc
a pop up will appear, close it. then type
slmgr.vbs /ato
Check these commands if your system activates then okay otherwise reply here & we will try more resolutions.

Tried what you said but it failed to activate.

I havn't been able to find anything that looks like that. I think i'll try contacting the person who I brought my PC from tomorrow and see where that gets me.