How do I reinstall Windows Defender?


A

Aquayogi

Recently, while downloading a definition update, something happened which
made Windows Defender corrupt. The update failed, and now Defender won't run,
giving me a failed to initialize error. How do I reinstall Defender into
Vista? I tried to download it again but it said I have Vista and it's already
on my system. I run Windows Vista Home Premium 32 bit.
 
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E

Engel

Hi Aquayogi,

0x800700C1 -2147024703 ERROR_BAD_EXE_FORMAT is not a valid Win32 application

That error usually indicates the file is corrupt.
- -- --

I notice you been try diferent solutions,

http://www.microsoft.com/communities/newsgroups/en-us/default.aspx?author=Aquayogi&email=anonymous@discussions.microsoft.com&cid=74fe2dde-4f0e-4c05-9872-fa5e2ca71d85&dg=microsoft.private.security.spyware.install&cat=en_US_b06f87c7-81ad-4cc4-ba6d-c6f09f0d9226&lang=en&cr=US

You might try this. Go to the main Windows Update window and click on
"Installed Updates" (on the left-hand side of the window, at the bottom), and
then remove "Update for Microsoft Windows (KB931099)" (only).

Reboot. Reboot again. Go back to Windows Update, and re-install the same
update, by clicking on the Check for Updates button.

This should essentially re-install Windows Defender on Vista.

--
Also, you can get direct help from Microsoft for issues with virus
infections or issues related to security patches.

I'd recommend calling 1-866-pcsafety if you are in the U.S. or Canada.

Elsewhere, call your local Microsoft subsidiary, or the number for paid
support in your locale--and ask for the free help with virus or
security-patch related issues.

This help extends to spyware removal as well.

If you /clearly/ state that a specific update or virus has caused problems
and don't ask any other questions, you /should/ receive No Charge support for
the issue.

Good luck
-







wrote:
 
A

Aquayogi

Reinstalling the definition again didn't fix the corrupt files.
 
A

Aquayogi

First let me start by congratulating you on being the first person to solve
this problem! Thank you SOOOO much! Now Defender is up and running. I have a
quick question. Do you think it is safe to download the update definition for
it? I have turned off auto-update and I am able to sit with this computer and
watch it update.
 
B

Bill Sanderson

Excellent--you hit that one exactly right, and it is one I'd missed--thanks!

news:8B7936FA-5523-4699-B01D-3A46D259ADCD@microsoft.com...
 
A

Aquayogi

Still Mr. Sanderson you deserve some thanks as well for working with me on
the other thread. Good job to both of you.
 
E

Engel

Hi Aquayogi, and Bill S.

This is a peer-to-peer newsgroup, /voluntary/support

Answers generally come from people like you, myself and others. you weed
hrough the thousands of posts to find them.

With very few exceptions, no one here represents Microsºft.

The other people answering questions here volunteer on their own time.

However, there are a number of volunteers who typically review the
newsgroups. The newsgroups are designed for peer to peer discussions and
support. Sometimes a question can be overlooked and not replied to and
sometimes it isn't replied to because the answer may not be known immediately

I thank you for your words, but the credit is for Dean-Dean a regular
contributor here,

Giving credit where credit is due!

Happy Christmªs

Ǝиçεl
- - - -


FAME
Greater things are believed of those who are absent. —Tacitus
 
A

Aquayogi

Well many thanks to Dean-Dean as well!

Engel said:
Hi Aquayogi, and Bill S.

This is a peer-to-peer newsgroup, /voluntary/support

Answers generally come from people like you, myself and others. you weed
hrough the thousands of posts to find them.

With very few exceptions, no one here represents Microsºft.

The other people answering questions here volunteer on their own time.

However, there are a number of volunteers who typically review the
newsgroups. The newsgroups are designed for peer to peer discussions and
support. Sometimes a question can be overlooked and not replied to and
sometimes it isn't replied to because the answer may not be known immediately

I thank you for your words, but the credit is for Dean-Dean a regular
contributor here,

Giving credit where credit is due!

Happy Christmªs

Ǝиçεl
- - - -


FAME
Greater things are believed of those who are absent. —Tacitus
 
R

rosko

You are a genius!
Thanks a million for the very useful tip.

Luc (Belgium)
 
J

James

Engel,
You had mentioned:
"You might try this. Go to the main Windows Update window and click on
"Installed Updates" (on the left-hand side of the window, at the bottom), and
then remove "Update for Microsoft Windows (KB931099)" (only).
The problem I am having is that when I try to remove "Update for Microsoft
Windows (KB931099)", it will not allow me to delete. Any suggestions as to
how to delete this?

Thanks, James
 
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B

Bill Sanderson

James - I am able to remove and reinstall that update on my system without
obvious issues.

What problem are you trying to resolve by uninstalling this update?

Is the version of Vista you are working with an upgrade from Windows XP?
 
N

nitin chakote

Aquayogi said:
Recently, while downloading a definition update, something happened which
made Windows Defender corrupt. The update failed, and now Defender won't run,
giving me a failed to initialize error. How do I reinstall Defender into
Vista? I tried to download it again but it said I have Vista and it's already
on my system. I run Windows Vista Home Premium 32 bit.
 
N

nitin chakote

right from the installation on dell ispiron 530 ,windows defender is not
working propely.can i reinstall windows defender?
 
B

Bill Sanderson

What version of windows? If this is Windows Vista, the answer is no.

However, define "not working properly?"

If you have installed Windows Live OneCare, or Microsoft Forefront Client
Security, these applications include the functionality of Windows Defender
and will disable the Windows Defender User Interface.
 
C

Cor

Hi,

I uninstalled update KB931099 but when I try to reintsall it it says "update
does not apply to your system". So, still no Windows Defender, not even the
folder in Program Files and One Care keeps giving me an unprotected warning.

Any solution short of reinstalling Vista again?

Thks

Regards

Cor
 
B

Bill Sanderson

I would do a repair install of Vista.

I have to say, though, that I'm not dead certain how to do this, unless
perchance you have not yet installed Service Pack 1.

The usual route is to start Windows, insert the Vista DVD, and tell it to
upgrade.

However, my experience with a system I have with a beta SP1 on it is that I
got "sorry, no can do--installed OS is newer than the DVD--can't upgrade!"
(or words to that effect.)

In which case you'd need to remove SP1, then run the upgrade, then go back
to WU and put back SP1 and any ancillary updates that are missing.

OneCare comes with live support--have you tried running the errors that it
gives past that support?
 
J

jimmyo

Aquayogi said:
Recently, while downloading a definition update, something happened which
made Windows Defender corrupt. The update failed, and now Defender won't run,
giving me a failed to initialize error. How do I reinstall Defender into
Vista? I tried to download it again but it said I have Vista and it's already
on my system. I run Windows Vista Home Premium 32 bit.
 
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Joined
Jan 27, 2014
Messages
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Recently, while downloading a definition update, something happened which
made Windows Defender corrupt. The update failed, and now Defender won't run,
giving me a failed to initialize error. How do I reinstall Defender into
Vista? I tried to download it again but it said I have Vista and it's already
on my system. I run Windows Vista Home Premium 32 bit.
Hi, You cannot find a Installation package for Windows Defender. You can revoke it easily.
 

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