Windows Defender error 0x800106ba

[Bquinn]

12/11/2007

Long post, sorry.
Desktop computer with new clean install of Vista Ultimate about 15 Oct 2007.
Everything else works. Tried to open and to start to run Windows Defender
in order to scan my disks and got a message something like this:

Application failed to initialize : 0x800106ba. A problem caused this
program service to stop. To start the service, restart your computer or
search Help and Support for how to start a service manually. Did the
restart, however IT DID NOT CORRECT THE START PROBLEM of Windefend. I went
to services to try to start it manually by right clicking on the WinDefend
and selecting start. The message received was:

Windows Defender could not be started.
System error 2 has occurred
The system can not find the file specified svchost.exe in the Windows
System32 folder.

I checked to insure that the file was in the system32 folder. It was.

Check Google and one fellow said that the command: 'net start windefend'
worked for him. I typed the command: 'net start windefend' and got the
following messages:

The Windefend service is starting and then
The Windefend service could not be started
A system error has occurred
System error 2 has occurred
The system cannot find the file specified

Went to the MS download site and downloaded new Defender program and tried
to install the program over the installed version. Received this message
when starting the install - "You do not need to install this software
because Windows Defender is included in Windows Vista. You can access
Windows Defender from the Security Section of the Control Panel.

Went to Control Panel - Programs and Features - Uninstall or Change a
program, but Windows Defender was not listed. I guess it was not listed
since it was included in the release of Vista. Went to msconfig and
disabled all services and rebooted. Used the command 'net start windefend'
and got the same system 2 error answer. Computer still operates with no
other problems noted. I wonder if my security program "Avira Premium
Security Suite" is blocking the Defender? It shouldn't be true since I
stopped all services and got the same error.

Any suggestions are welcomed. Thanks.

Bill Quinn

 

[Engel]

Hello Bquinn,

I quote dean – dean --a regular contributor here:

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.

 

[Bquinn]

Thank you Engel for your help. Did the uninstall of KB931 099 update as
outlined in your message, rebooted two times, and then ran the update
program which did reinstall the KB931 099 and KB915 579.

I still get those same error messages so the Defender is not fixed. Since
the computer is running OK with those problems maybe I should stop trying to
fix it --- or should I say live with it.

Again thanks for you help and interest.

Bill Quinn

 

[Engel]

Hi Bill,

I'm not sure about this--but it looks promising--

<http://support.microsoft.com/default.aspx/kb/935511/en-us>


Good luck

 

[Engel]

See here:

http://www.microsoft.com/communitie...pt=&catlist=&dglist=&ptlist=&exp=1&sloc=en-us

Event Viewer - Windows Vista features a unified event log so that a support
professional can view all the operational information about a machine from a
single Event Viewer.

<http://www.microsoft.com/downloads/...60-CF5F-4B62-B985-6BF494F42EF9&displaylang=en>


Windows Defender - Windows Defender works with Internet Explorer 7 to help
you make conscious choices about software installed on your PC by providing
always-on protection that monitors key system locations, watching for changes
that signal the presence of unwanted spyware.

<http://www.microsoft.com/downloads/...20-ea7c-489b-8d66-fde0606de2ad&DisplayLang=en>

Good luck
- -- ---

 

[kiwi]

Thanks Engle,

Just trying sfc scannow to see what if any vista programs are faulty/corrupt.
If this does not help will try your suggestions

 

[Robinb]

also you cannot uninstall Windows Defender in Vista
you can disable it by unchecking the resident shield
robin

 

[Ray]

Thank you for this information

 

[jhlouie]

This same process worked for me too running Windows Vista. Thanks for
posting this info!!

 

[Jeff]

Thanks. This worked for me too. This is the first time I have used Windows
Live for a fix. I will use it again now that I have found that it works. I
have a 64 bit system, but it worked just the same. Thanks Again...Jeff

 

[Rach]

Excellent! Thank you. It worked first time and I only had to reboot once.
System is running perfectly and Defender immediately did a scan to check all
is well. Thank goodness for forums

 

[Manuel from Mumbai, India]

Thanks. Your sdolution effectively got rid of the niggling problem on my Acer

 

[JI]

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

 

[FromTheRafters]

http://www.vistaheads.com/forums/mi...162723-windows-defender-error-0x800106ba.html

 

[yonniemac]

in properties where did you change form manual to auto