Windows 7 Ultimate SP1. Not genuine error 0xC004F200

Hi guys.
I bought this Emachines laptop off Ebay recently with 7 already on it. It's been running perfectly fine up until this morning when, on startup, it popped up a Windows activation window showing "Windows not genuine" and error code 0xC004F200.

Ran MGADiag, results below:

Code:

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

Validation Code: 0
Cached Online Validation Code: 0xc004c4a2
Windows Product Key: *****-*****-GJY49-VJBQ7-HYRR2
Windows Product Key Hash: W5/6nm6F2UPXrCkY5xUhXb/+21g=
Windows Product ID: 00426-OEM-8992662-00006
Windows Product ID Type: 2
Windows License Type: OEM SLP
Windows OS version: 6.1.7601.2.00010100.1.0.001
ID: {9583D6B8-D349-4900-A507-321A447DCA1D}(3)
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.130104-1431
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 Professional Plus 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

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-->
File Mismatch: C:\Windows\system32\systemcpl.dll[6.1.7600.16385], Hr = 0x800b0100
File Mismatch: C:\Windows\system32\user32.dll[6.1.7600.16385], Hr = 0x800b0100

Other data-->
Office Details: <GenuineResults><MachineData><UGUID>{9583D6B8-D349-4900-A507-321A447DCA1D}</UGUID><Version>1.9.0027.0</Version><OS>6.1.7601.2.00010100.1.0.001</OS><Architecture>x32</Architecture><PKey>*****-*****-*****-*****-HYRR2</PKey><PID>00426-OEM-8992662-00006</PID><PIDType>2</PIDType><SID>S-1-5-21-3069572113-1991023704-855868692</SID><SYSTEM><Manufacturer>eMachines</Manufacturer><Model>eME732</Model></SYSTEM><BIOS><Manufacturer>INSYDE</Manufacturer><Version>V1.01</Version><SMBIOSVersion major="2" minor="6"/><Date>20100813000000.000000+000</Date></BIOS><HWID>30DF3607018400FC</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>_ASUS_</OEMID><OEMTableID>Notebook</OEMTableID></OEM><GANotification/></MachineData><Software><Office><Result>100</Result><Products><Product GUID="{90120000-0011-0000-0000-0000000FF1CE}"><LegitResult>100</LegitResult><Name>Microsoft Office Professional Plus 2007</Name><Ver>12</Ver><Val>AD9796BA2013586</Val><Hash>Wob91FYIxd9xABGknkqRfBfobr4=</Hash><Pid>89409-707-0286714-65743</Pid><PidType>14</PidType></Product></Products><Applications><App Id="15" Version="12" Result="100"/><App Id="16" Version="12" Result="100"/><App Id="18" Version="12" Result="100"/><App Id="19" Version="12" Result="100"/><App Id="1A" Version="12" Result="100"/><App Id="1B" Version="12" Result="100"/><App Id="44" Version="12" Result="100"/></Applications></Office></Software></GenuineResults>  

Spsys.log Content: 0x80070002

Licensing Data-->
Input Error: Can not find script file "C:\Windows\system32\slmgr.vbs".

Windows Activation Technologies-->
HrOffline: 0x00000000
HrOnline: 0x00000000
HealthStatus: 0x0000000000000000
Event Time Stamp: 2:19:2013 10:21
ActiveX: Registered, Version: 7.1.7600.16395
Admin Service: Not Registered - 0x80070005
HealthStatus Bitmask Output:


HWID Data-->
HWID Hash Current: MAAAAAEAAgABAAEAAAACAAAAAgABAAEAJJTy45LumlGs/fQ0JCEWB/qSfCtsr1xd

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            ACRSYS        ACRPRDCT
  FACP            ACRSYS        ACRPRDCT
  HPET            ACRSYS        ACRPRDCT
  BOOT            ACRSYS        ACRPRDCT
  MCFG            ACRSYS        ACRPRDCT
  WDAT            ACRSYS        ACRPRDCT
  ASF!            ACRSYS        ACRPRDCT
  SLIC            _ASUS_        Notebook
  ASPT            ACRSYS        ACRPRDCT
  SSDT            PmRef        CpuPm

All Greek to me I'm afraid!

It has Microsoft Security Essentials installed.
It hasn't had any registry cleaners used on it that I'm aware of.

Any advice you can give will be greatly appreciated.

Cheers, Scruff.

Thanks guys.

Not great news but about what I was expecting.

Sadly the COA sticker is too worn to read and I don't have any recovery media for the machine.

I've emailed the seller but I won't be holding my breath...

Can you still buy Windows 7 direct from MS or would I need to go elsewhere? Would I need to buy in MS office as well?

Thanks again, Scruff.