Windows 7 not genuine message after two years of no problems

Hello - I have been using Windows 7 for two years now, but all of a sudden I am getting messages that the product is not genuine. After two years! Surely there has been a mistake somewhere as the product was succesfully activated when originally purchased, and used without problem since then... any ideas?
Thank you

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

Validation Code: 0
Cached Online Validation Code: N/A, hr = 0xc004f012
Windows Product Key: *****-*****-D6R9M-PBGGB-B7JF6
Windows Product Key Hash: fWkl7LzaZ2lCsCTZleYJieZBn2o=
Windows Product ID: 00426-068-3152935-86338
Windows Product ID Type: 5
Windows License Type: Retail
Windows OS version: 6.1.7601.2.00010100.1.0.001
ID: {4FE24939-F0DA-4D9C-8F94-2DE177EDAB5F}(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.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; Win32)
Default Browser: C:\Users\Fuser\AppData\Local\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-->
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>{4FE24939-F0DA-4D9C-8F94-2DE177EDAB5F}</UGUID><Version>1.9.0027.0</Version><OS>6.1.7601.2.00010100.1.0.001</OS><Architecture>x32</Architecture><PKey>*****-*****-*****-*****-B7JF6</PKey><PID>00426-068-3152935-86338</PID><PIDType>5</PIDType><SID>S-1-5-21-3236762424-1352320480-1975186448</SID><SYSTEM><Manufacturer>System manufacturer</Manufacturer><Model>System Product Name</Model></SYSTEM><BIOS><Manufacturer>American Megatrends Inc.</Manufacturer><Version>1102 </Version><SMBIOSVersion major="2" minor="4"/><Date>20070130000000.000000+000</Date></BIOS><HWID>C9AA3607018400FA</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><OEMID>KOZIRO</OEMID><OEMTableID>FRONTIER</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, RETAIL channel
Activation ID: a0cde89c-3304-4157-b61c-c8ad785d1fad
Application ID: 55c92734-d682-4d71-983e-d6ec3f16059f
Extended PID: 00426-00172-068-315293-00-2057-7601.0000-0462013
Installation ID: 006295221044252711379213641205074923800530578710295544
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: B7JF6
License Status: Initial grace period
Time remaining: 4260 minute(s) (2 day(s))
Remaining Windows rearm count: 3
Trusted time: 15/02/2013 19:42:04

Windows Activation Technologies-->
HrOffline: 0x00000000
HrOnline: 0xC004C4A2
HealthStatus: 0x0000000000000000
Event Time Stamp: 1:19:2013 18:07
ActiveX: Not Registered - 0x80040154
Admin Service: Not Registered - 0x80040154
HealthStatus Bitmask Output:


HWID Data-->
HWID Hash Current: NgAAAAEABgABAAEAAAACAAAAAQABAAEAeqjk9OaFgPjs2JJFLvcIhdxGrmLKaZqIElvk28wx

OEM Activation 1.0 Data-->
N/A

OEM Activation 2.0 Data-->
BIOS valid for OA 2.0: yes
Windows marker version: 0x0
OEMID and OEMTableID Consistent: yes
BIOS Information:
ACPI Table Name OEMID Value OEMTableID Value
APIC MSTEST OEMAPIC
FACP MSTEST OEMFACP
HPET MSTEST OEMHPET
MCFG MSTEST OEMMCFG
SLIC KOZIRO FRONTIER
OEMB MSTEST AMI_OEM

Hi there - firstly, thanks for taking the time to look at my problem!
I bought it from a reputable seller on ebay: he does run a bona fide computer shop.
Never mind - I guessed there wouldn't be an easy way around this so I've just ordered a new PC with windows 8 pre-installed. My current machine is a good 5 years old so it seemed like a good excuse to upgrade. Wifey didnt complain anyway!
:)

Hi - no, the shop isnt still going or I'd have filled in the 'report counterfeit software' thing on the MS website to see if perhaps they might give me a complimentary copy seeing as I had bought and used it in good faith.
Still, if nothing else it has taught me never to buy Windows from ebay again!