This same process worked for me too running Windows Vista. Thanks for
posting this info!!
"mlt503" wrote:
Quote:
>
> This may be a bit late but I experienced the same problem on my Toshiba
> laptop running Vista Home / 32 bit OS.
> I tried all the solutions online but nothing helped fix the irritating
> 0x800106ba error that Defender would put up when I tried to launch it
> using the icon in Control Panel.
> The fix that worked for me was to go to Start/Control
> Panel/Administrative Tools/Services.
> I found Windefend (or Windows Defender) and left-clicked, then
> right-clicked to bring up the pull-down menu. Clicked on Properties and
> changed the status from manual to automatic!
> I re-booted TWICE (because it was advised on one of the forums) and
> it's running fine now.
> Now if your Defender is already set to automatic and you're seeing the
> same error, I would change it to manual, go thru ALL the above steps
> (and try not to be too impatient) and then change it to automatic,
> reboot twice and see what happens.
> As a side note, my version of Vista won't allow un-installing Update
> KB931099 to fix this problem.
> Keep trying, the great feeling you get when you troubleshoot this
> successfully may be the highlight of your day.
> Good luck!!!!
>
> Mark 
>
>
> --
> mlt503
>