Vista - Defender Failed 0x800106ba-0x80092003

I turned on my Vista64 PC today to find that Defender has decided to stop working!

It pops up a message with error number 0x800106ba.

A search of the knowledgebase advises removing Defender and re-installing with Run>appwiz.cpl but when I do this "Defender" isn't in the list of installed programs.

It isn't in the "Turn Windows features on or off" section either.

Running the WindowsDefender installer package just says it's already installed and doesn't offer Repair/Uninstall options.

Starting the Defender service through "Computer Management" fails and produces an 0x80092003 error which is an error relating to reading or writing to a file.


I feel this problem has been introduced by an Automatic Update as nothing else has changed since yesterday.

Anyone else having this problem?

Thanks GH

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.

Hi Engel

I saw your advice here in an earlier Post. Gave it a go, but It hasn't fixed the problem.

Also tried a system restore, but the earliest resotre point now seems to be immediately after the offending update!

GH

Troubleshooting Windows Defender

http://support.microsoft.com/kb/555957

Tried many things. Your link above mainly relates to XP as most of the steps don't apply to Vista64 and those that do have no effect.

I'm getting this error now:

"application failed to initialize: 0x800106ba. The RPC server is unavailable."

What a Crock! I've wasted the whole day trying to resolve this issue that seems to be the result of an Automatic Update!

All I can do now is disable Defender in MSCONFIG and wait.....ZZZZzzzzzzz

try this...

click start, and in the search box type " services ", and check that windows defender is set to automatic

I had the same problem after upgradeing from Vista32 bit to Vista64 bit. Here's what I did to fix mine;
1. Click start
2. Type Run MsConfig
3. On the System Config Window Click on the Services Tag
4. Click on the "hide all Microsoft Services" option.
5. Click on the Start Up Tab at the top.
6. Scroll down to the Windows Defender box and Uncheck it.
7. Go back to the Services Tab and Uncheck "hide all Microsoft Services".
8. Click on Apply, and OK.
9. Restart Computer
This took care of my problems. Hope it helps you too!

You're a GENIUS!!!

Use the admin settings to check the manuel or auto run settings and fix the error in windows defender by changing the way it runs. Auto or manuel and then reset back to run atuomatic at startup of system start.

mvgrats.....thank you soooo much!!!