Please help any genius

HI

thanks in advance ,,i wanted to ask help because i have been facing a problem when i login in my pc a black scrren comes and a message saying 'an unauthorized change has been made in windows .please reinstall....."
i used mgadiag and it showes this info--


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

Validation Code: 50
Cached Online Validation Code: N/A, hr = 0xc004f012
Windows Product Key: *****-*****-TMVMJ-BBMRX-3MBMV
Windows Product Key Hash: 55n8g6xdzhe4AOWhmTzdzQoLfa4=
Windows Product ID: 00426-292-0000007-85455
Windows Product ID Type: 5
Windows License Type: Retail
Windows OS version: 6.1.7600.2.00010100.0.0.001
ID: {8E96CF49-D7A4-4765-A1E8-2FB2097B9F70}(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: 7600.win7_rtm.090713-1255
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: 114 Blocked VLK 2
Microsoft Office Professional Edition 2003 - 114 Blocked VLK 2
Microsoft Office FrontPage 2003 - 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: N/A, hr=0x80070002
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\user32.dll[6.1.7600.16385], Hr = 0x800b0100

Other data-->
Office Details: <GenuineResults><MachineData><UGUID>{8E96CF49-D7A4-4765-A1E8-2FB2097B9F70}</UGUID><Version>1.9.0027.0</Version><OS>6.1.7600.2.00010100.0.0.001</OS><Architecture>x32</Architecture><PKey>*****-*****-*****-*****-3MBMV</PKey><PID>00426-292-0000007-85455</PID><PIDType>5</PIDType><SID>S-1-5-21-3046710794-793028100-2804303767</SID><SYSTEM><Manufacturer>Gigabyte Technology Co., Ltd.</Manufacturer><Model>945GCM-S2L</Model></SYSTEM><BIOS><Manufacturer>Award Software International, Inc.</Manufacturer><Version>F5u</Version><SMBIOSVersion major="2" minor="4"/><Date>20080714000000.000000+000</Date></BIOS><HWID>E5BB3607018400F8</HWID><UserLCID>4009</UserLCID><SystemLCID>0409</SystemLCID><TimeZone>India Standard Time(GMT+05:30)</TimeZone><iJoin>0</iJoin><SBID><stat>3</stat><msppid></msppid><name></name><model></model></SBID><OEM/><GANotification/></MachineData><Software><Office><Result>114</Result><Products><Product GUID="{90110409-6000-11D3-8CFE-0150048383C9}"><LegitResult>114</LegitResult><Name>Microsoft Office Professional Edition 2003</Name><Ver>11</Ver><Val>59D1605114E3500</Val><Hash>vfZmaSmFPIYrLWTcZSZErUQg+Fo=</Hash><Pid>73931-640-0000106-57499</Pid><PidType>14</PidType></Product><Product GUID="{90170409-6000-11D3-8CFE-0150048383C9}"><LegitResult>100</LegitResult><Name>Microsoft Office FrontPage 2003</Name><Ver>11</Ver><Val>5EA9C3672EB0500</Val><Hash>GZD+9sfb5ecL3RxyV4F75a86u2M=</Hash><Pid>72079-640-0000106-55567</Pid><PidType>14</PidType></Product></Products><Applications><App Id="15" Version="11" Result="114"/><App Id="16" Version="11" Result="114"/><App Id="17" Version="11" Result="100"/><App Id="18" Version="11" Result="114"/><App Id="19" Version="11" Result="114"/><App Id="1A" Version="11" Result="114"/><App Id="1B" Version="11" Result="114"/><App Id="44" Version="11" Result="114"/></Applications></Office></Software></GenuineResults>

Spsys.log Content: 0x80070002

Licensing Data-->
On a computer running Microsoft Windows non-core edition, run 'slui.exe 0x2a 0xC004F012' to display the error text.
Error: 0xC004F012

Windows Activation Technologies-->
HrOffline: 0x00000000
HrOnline: N/A
HealthStatus: 0x0000000000000000
Event Time Stamp: N/A
ActiveX: Registered, Version: 7.1.7600.16395
Admin Service: Not Registered - 0x80070005
HealthStatus Bitmask Output:


HWID Data-->
HWID Hash Current: MgAAAAIAAgABAAEAAQABAAAAAgABAAEAeqiCtp37Ro6qdgbo2g O6qI3vkA2g48gzRso=

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 GBT GBTUACPI
FACP GBT GBTUACPI
HPET GBT GBTUACPI
MCFG GBT GBTUACPI
SSDT PmRef Cpu0Ist
SSDT PmRef Cpu0Ist


any help would be accepted so please help guys


thanks

System32 is all i say.