Win 7 OEM Product key invalid

That looks as if you used a normal command prompt window rather than an Elevated one??

Try again, making certain that you run the CMD command as Admiistrator

(standard spiel follows)

Here are some instructions to make life easier :)
1) To open an Elevated Command Prompt Window (the CP window), click on Start, All Programs, Accessories – then right-click on Command Prompt, and select Run as Administrator. Accept the UAC prompt.
2) To run the commands easier, highlight the block of commands, and right-click on the highlight – select Copy. In the CP Windows, click on the black/white icon at top left – select Paste. The commands will run but may not complete the last command, so hit the Enter Key once.
3) To copy the results... click on the Black/White icon in the top left, and select Edit... 'Select All', and hit the Enter key - then use Ctrl+V or r-click+Paste to paste it into your response.

Ahah! - a meaningful error message at last :)
0xC004F050 usually means that you've misread a character - either C/G or B/8 or Y/V are the most common.

Note that the following characters cannot be used - A E I L N O S U Z 1 0 - so don't bother trying unless you like the noise it makes :)
an O/0 is almost always a Q

You're a genius! Excellent thank you! it worked - the last 8 was a B - not helped by a line on the COA certificate:

Diagnostic Report (1.9.0027.0):
-----------------------------------------
Windows Validation Data-->
Validation Code: 0
Cached Online Validation Code: 0x0
Windows Product Key: *****-*****-****-****-***B2
Windows Product Key Hash: gEiHKwYm9t5ii5ExIodhKD2fHLA=
Windows Product ID: 00359-OEM-8703953-33286
Windows Product ID Type: 3
Windows License Type: OEM System Builder
Windows OS version: 6.1.7601.2.00010300.1.0.003
ID: {02256A7D-DAB7-4B5B-AB5B-32F374B6297A}(3)
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.120503-2030
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>{02256A7D-DAB7-4B5B-AB5B-32F374B6297A}</UGUID><Version>1.9.0027.0</Version><OS>6.1.7601.2.00010300.1.0.003</OS><Architecture>x64</Architecture><PKey>*****-*****-*****-*****-GY8B2</PKey><PID>00359-OEM-8703953-33286</PID><PIDType>3</PIDType><SID>S-1-5-21-3573908096-3161395031-3421867903</SID><SYSTEM><Manufacturer>System manufacturer</Manufacturer><Model>System Product Name</Model></SYSTEM><BIOS><Manufacturer>American Megatrends Inc.</Manufacturer><Version>0802 </Version><SMBIOSVersion major="2" minor="5"/><Date>20111202000000.000000+000</Date></BIOS><HWID>59633A07018400FC</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_COA_NSLP channel
Activation ID: 586bc076-c93d-429a-afe5-a69fbc644e88
Application ID: 55c92734-d682-4d71-983e-d6ec3f16059f
Extended PID: 00359-00174-039-533286-02-2057-7601.0000-2242012
Installation ID: 011911954436126865636602143731376345052465119224802244
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: GY8B2
License Status: Initial grace period
Time remaining: 40320 minute(s) (28 day(s))
Remaining Windows rearm count: 3
Trusted time: 11/08/2012 00:34:58
Windows Activation Technologies-->
HrOffline: 0x00000000
HrOnline: 0x00000000
HealthStatus: 0x0000000000000000
Event Time Stamp: 8:10:2012 23:18
ActiveX: Registered, Version: 7.1.7600.16395
Admin Service: Registered, Version: 7.1.7600.16395
HealthStatus Bitmask Output:

HWID Data-->
HWID Hash Current: NAAAAAEABAABAAEAAAACAAAAAgABAAEAln2wkGIj4ms4mBAzVPKmr4hfYj2ygh73qt0UDw==
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 120211 APIC1016
FACP 120211 FACP1016
HPET 120211 OEMHPET
MCFG 120211 OEMMCFG
OEMB 120211 OEMB1016
SSDT A M I POWERNOW

That should now activate easily :)

I'm off to bed also - so good luck, and I'll see you on the flip-side.

Glad to hear it!
Please post a new MGADiag report just for peace-of-mind, and to round the thread out :)

Good luck.

Thanks a lot - that looks fine now :)