Have you tried going to Windows Update and checking for available updates?
Whatever you do, (installing and updateting or unistalling) always as a
administratºr.
This is the key!
The installation as an admin is not enough.
You needed to login as an Adm!n!stratºr.
Can you gº to Windows Update, select Express (Get high-priority updates),
and apply all offered updªtes
http://update.microsoft.com
Once that is finished, can you verify the update installs? There are many
pre-requisite files which are needed from windows update and signature update
with windows defender will fail until you hªve these f!les.
After , see here:
http://support.microsoft.com/kb/904423/en-us
Good luck
--
"FlaglerCollege" wrote:
> Excellent! Not because this issue exists.. But the fact that I am not the
> only one experiencing it!! Agreed, let's get an idea on what might be
> happening here Microsoft.... 
>
> "Antipode" wrote:
>
> > I am also having this issue...I use defender to protect my 1500+ W2K3
> > Enterprise. I've instructed my people to ignore this error, as most machines
> > seem to work fine to spite it. Anyone from Microsoft want to take a crack at
> > this? I installed the new Defender on my home machine without a GPO and
> > didn't get the error.