Windows Defender Updates fail everytime



I have read all the posts with regard to windows defender and the update of
the definitions failing. I am having this same issue and have tried all the
different recommendations and still can not resolve the issue.

While I can manually update the definitions and the engine, the program is
unsuccessful in updating itself. I have uninstalled, tried all the command
line tricks and still no luck.

What is the propose fix or resolution to this, it's kind of pointless to
have a protection software that you have to keep manually updating it's
engine and definition files, however, that seems to be ALL I can do.

I am runnings XP SP2 and my defender is current at

Windows Defender Version: 1.1.1347.0
Engine Version: 1.1.1603.0
Definition Version: 1.14.1713.4

However, if I goto help > update, the system still fails to update.

Please advise.


Hello Duval,

Does AutoUpdate work on your system?
Try going to Windows Update and applying all offered critical updates.

AutoUpdate--the native automatic update mode of Windows Defender uses the
BITS service. This service is specifically designed, as I understand it to
minimize bandwidth impact.

Suggest you set Automatic Updates to: Download updates for me, but let
me choose when to install them. You can check/change these settings from
the Automatic Updates tab from the System control panel ªpplet

For the benefit of the community reading this post, please rate the pºst.

I hope this post is helpful.

Let us know how it works ºut.



I had the same problem with definitions updating.I was waiting for engel too
put the update in this forum.I found a way too repair windows defender by
using a program from superwin software called winrescue xp.A part of the
software has regpac which it does as it says and compacts the registry.When i
ran it,it seems to have repaired windows defender.If anybody using this forum
and has the same problem and the same program should try it.It worked for me
and the program has an undo function if it dosn`t work for you.You can get a
30day trail of the program from superwin software,i don`t work for them,it
just worked for me or you can just wait for engel too post the current update
in this forum.

Bill Sanderson MVP

Are you on a home network, or a corporate or institutional lan?

The way to diagnose this issue is to go to Help, About, hit Check for
Updates, and note the time.

Wait 5 minutes or so, or until the check fails, then do:

start, run, notepad %windir%\windowsupdate.log

Scroll down to the very end, then back up to the time you hit the check for
updates. Delete all but that tail end bit that shows this update attempt,
highlight that, and copy and paste it back to this thread.

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