Windows 7: troubleshooter error code 0x80070002

dears,

every time i wanna use the trobleshooter it stops
for example if i tried to use the network trobleshooter it give me
" unexpected error has occurred. the troubleshooting wizard can't continue."
when i click on "view error deatails" it gives me the following :


Package ID : networkDiagnostics
path: C:\windows\diagnostics\system\networking
error code: 0x80070002
Source: Engine
User: Mycomputer\ computer-PC
Context: Restricted

not just the networking troubleshooter all the troubleshooters giving me the same.

i tried every thing but nothing is working please help

I'm no expert on this but I did find this that might help you.
You receive a "0x80070002" or "0x80070003" error code after you download an update from Windows Update, from Microsoft Update, or from Windows Server Update Services

I tried that but when I open services.msc there is nothing called automatic update

Try using it as administrator and see if things work for you.

I just tried it and it didn't work

Did you try the automatic fix on this page?

http://http://support.microsoft.com/kb/910336

i tried the link pressed on fix , after some time they asked me to restart , i did and the problem still

Try these:
1. Open services.msc from run. Then go to Cryptographic Services. Right click it & select Properties. Change startup type to automatic. Click Apply. Restart PC.
If that does not work then
2. in IE, tools, advanced tab in the settings section. under the security section, uncheck "check for publishers certificate revocation" and "check for server certificate revocation".
run the PowerShell commands: Import-Module TroubleshootingPack
$aero = Get-TroubleshootingPack $env:SystemRoot\Diagnostics\System\Aero
Invoke-TroubleshootingPack -Pack $aero -Result C:\DiagResult -unattend
3. Uninstall .NET Framework & download & install the latest one.

1- i rtried it b4 and didnt work.
2- when ever i start PowerShell commands an MS dos windows apears for less than 1 sec and nothing happens , i toke a screen shot to see whats writen in it , it says : "internal windows powershell error. Invokeing managed windows powershell failed with error 80070002"

and i tried no. 3 also didnt work

Run sfc /scannow from cmd prompt/ admin. and let us know the results.