Windows Defender not working

I have a new Dell Studio Desktop 540 using Vista SP1. Very early on I
started getting "Windows defender" error on screen "Application failed to
initialize: error 0x800106ba. I was getting it on each startup until
isolating via MS Config.

The "Windows Defender" program does not appear in control panel.

I went to "Windows update" page, as I arrived there it said on important
update was waiting, by chance it was a windows defender update, I installed
it and it worked and I was able to launch windows defender. As I had altered
the start-up in MSCONFIG I restored it to normal start-up and machine
started fine without any error.

However, when I select "Windows defender" from start-up menu I am getting
the same 0x800106ba error code. The program does still not appear in control
panel.

HOWEVER! It now runs ok sometimes but not others! When it doesn't run
I'm getting 0x800106ba error.

Dell suggested I revert PC back to as built status, but as I have just spent
2 days putting all my programs on and the fact that 2 hours ago I proved
Windows Defender does sometimes work perfectly well I'm not doing that.

Anyone got any ideas?

Next time it does run ok I thinking of uninstalling via add / remove
programs
and re-installing. Can't do it now as its not shown in the program list!

Thanks

All sorted thanks to cure on vista.security group:

Try this:



Ø Control Panel

Ø Administrative tools

Ø Services

Ø then locate WD and double click it

Ø select "startup type" as automatic

Ø then click "log on" tab

Ø click "Local System account" and check the only check box available.

Ø Click the "recovery" tab and make sure WD tries at least two times to
start

Ø Now, click the "General" Tab and click "start"

"Joe Bloggs" <pwormald@bigfoot.com> wrote in message
news:5IGdnZeZ_Y3MGV7UnZ2dnUVZ8ryWnZ2d@bt.com...
>I have a new Dell Studio Desktop 540 using Vista SP1. Very early on I
> started getting "Windows defender" error on screen "Application failed to
> initialize: error 0x800106ba. I was getting it on each startup until
> isolating via MS Config.
>
> The "Windows Defender" program does not appear in control panel.
>
> I went to "Windows update" page, as I arrived there it said on important
> update was waiting, by chance it was a windows defender update, I
> installed
> it and it worked and I was able to launch windows defender. As I had
> altered
> the start-up in MSCONFIG I restored it to normal start-up and machine
> started fine without any error.
>
> However, when I select "Windows defender" from start-up menu I am getting
> the same 0x800106ba error code. The program does still not appear in
> control
> panel.
>
> HOWEVER! It now runs ok sometimes but not others! When it doesn't run
> I'm getting 0x800106ba error.
>
> Dell suggested I revert PC back to as built status, but as I have just
> spent
> 2 days putting all my programs on and the fact that 2 hours ago I proved
> Windows Defender does sometimes work perfectly well I'm not doing that.
>
> Anyone got any ideas?
>
> Next time it does run ok I thinking of uninstalling via add / remove
> programs
> and re-installing. Can't do it now as its not shown in the program list!
>
> Thanks