Vista - Errors trying to update my Windows vista business

Since a couple of days along I've been receiving the following messagefrom windows defender:

The program can't check for definitions update

If I try and run the window update, it comes with this error code 0x80070424
I tried to look for this error and did everything that I could possibly could, first I tried to run regsvr32 wuaueng.dll an I had the following answer:

The module wuaueng.dll was loaded but the call to DIIREgisterServer failed with error code 0x80070424

The other thing that I did was to run the Microsoft Genuine Advantage Diagnostic Tool and I get this other error:
0x80070002 and all the diagnostic results are:

Diagnostic Report (1.7.0095.0):
-----------------------------------------
WGA Data-->
Validation Status: Genuine
Validation Code: 0
Online Validation Code: 0x0
Cached Validation Code: 0x0
Windows Product Key: *****-*****-*****-*****-FJGV9
Windows Product Key Hash: n10OlJbXUxdCVFgrlGiC+/+a6zo=
Windows Product ID: 55041-026-2548457-71612
Windows Product ID Type: 7
Windows License Type: Volume KMS Server
Windows OS version: 6.0.6001.2.00010100.1.0.006
CSVLK Server: N/A
CSVLK PID: N/A
ID: {E4162EC5-6F8E-4D03-A1CB-3B27139EDFAB}(3)
Is Admin: Yes
TestCab: 0x0
WGA Version: Registered, 1.7.69.2
Signed By: Microsoft
Product Name: Windows Vista (TM) Business
Architecture: 0x00000000
Build lab: 6001.longhorn_rtm.080118-1840
TTS Error:
Validation Diagnostic:
Resolution Status: N/A
WgaER Data-->
ThreatID(s): N/A, hr = 0x80070002
Version: 6.0.6002.16398
WGA 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
WGATray.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: Registered, 1.6.28.0
Signed By: Microsoft
Office Diagnostics: 025D1FF3-282-80041010_025D1FF3-170-80041010_025D1FF3-171-1_025D1FF3-434-80040154_025D1FF3-178-80040154_025D1FF3-179-2_025D1FF3-185-80070002_025D1FF3-199-3
Browser Data-->
Proxy settings: N/A
User Agent: Mozilla/4.0 (compatible; MSIE 7.0; Win32)
Default Browser: C:\Program Files\Internet Explorer\iexplore.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>{E4162EC5-6F8E-4D03-A1CB-3B27139EDFAB}</UGUID><Version>1.7.0095.0</Version><OS>6.0.6001.2.00010100.1.0.006</OS><Architecture>x32</Architecture><PKey>*****-*****-*****-*****-BBBBB</PKey><PID>55041-026-2548457-71612</PID><PIDType>7</PIDType><SID>S-1-5-21-2978373120-1270686543-1183256206</SID><SYSTEM><Manufacturer>MSI</Manufacturer><Model>MS-7309</Model></SYSTEM><BIOS><Manufacturer>American Megatrends Inc.</Manufacturer><Version>V1.6</Version><SMBIOSVersion major="2" minor="5"/><Date>20070124000000.000000+000</Date></BIOS><HWID>C7313507018400E8</HWID><UserLCID>0809</UserLCID><SystemLCID>0409</SystemLCID><TimeZone>SA Pacific Standard Time(GMT-05:00)</TimeZone><iJoin>0</iJoin><SBID><stat>3</stat><msppid></msppid><name></name><model></model></SBID><OEM/><BRT/></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>A0D158CEC0D4586</Val><Hash>tyI2ltTQSUUhka7cHlU8W6D00Q4=</Hash><Pid>89409-707-1380943-65578</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


Can someone help me please????

Caro