Vista - Windows Defender 0x800106ba

My daughter suddenly experiences: Windows Defender: "Error Code 0x800106ba
Application failed to initialize"

This is a fairly new machine (running Vista Home Premium) and it was
delivered with McAfee virus protection installed. The initial McAfee license
is about to expire so she renewed that license for a permanent licence
today. There may of course be a connection here, but I fail to see what that
connection could be.

She was guided to http://support.microsoft.com/kb/931849 which suggests to
initially remove (uninstall) Windows Defender and then reinstall it. The
only problem with this is that Windows Defender is not included in the list
of installed programs that can be uninstalled, and when she tries to
"reinstall" it Windows Defender is reported as already present on the
system.

I checked on my own system where Windows Defender is running without any
problem, and the same applies here: Windows Defender is not listed among
installed programs.

I shall be most grateful for comments and/or suggestions that can aid our
troubleshooting.

regards Sven

Windows Defender doesn't appear in the list if you have Vista because it is
part of the operating system. That KB article fails to mention which OS it
pertains to but you can't reinstall Defender that way in Vista. Try using
System Restore to return the system to a point before it started happening.
The following article describes how to do this:

http://support.microsoft.com/kb/935511/en-us

I note the only other option it gives is to reinstall Windows. You can do
this by running the Setup disc from within Windows and "upgrading" it over
itself.


"Sven Pran" <no.direct@xxxxxx> wrote in message
news:9BB79C5E-661A-47A0-AA93-666D32B4962C@xxxxxx

Sven

Here is your problem and resolution included

http://support.microsoft.com/kb/931849

--
Peter

Please Reply to Newsgroup for the benefit of others
Requests for assistance by email can not and will not be acknowledged.

"Sven Pran" <no.direct@xxxxxx> wrote in message
news:9BB79C5E-661A-47A0-AA93-666D32B4962C@xxxxxx

Thanks for the comment. However I am still worried because KB935511 refers
to installations where Windows XP has been upgraded to Vista. This computer
has to my knowledge never had Windows XP, it was delivered (from DELL) some
six weeks ago with Vista pre-installed.

regards Sven

"Rojo Habe" <noem@xxxxxx> wrote in message
news:93A0B604-D603-46FF-BC2E-1C0A68953280@xxxxxx

Thanks for your comment, but did you read my OP? KB 931849 is the very
article we tried without success to apply!

Sven

"Peter Foldes" <okf122@xxxxxx> wrote in message
news:uEGegUQnJHA.4652@xxxxxx

IF the McAfee 'thing' has it's own spyware component then Defender is
Disabled. Thus, the error message.

QED: What is the McAfee product installed ?
Check it's User Guide to see if there is a spyware component included.

MowGreen [MVP 2003-2009]
===============
*-343-* FDNY
Never Forgotten
===============


Sven Pran wrote:

Thanks for this information, I shall check exactly what features are
included in McAfee on my daughter's computer.
(I know that it has antivirus protection and a firewall.)

Now the interesting question: Is this "error" message something my daughter
has to live with or can it be disabled in any way (if McAfee includes the
appropriate protection)?

regards Sven

"MowGreen [MVP]" <mowgreen@xxxxxx> wrote in message
news:uhWhcpRnJHA.5412@xxxxxx

You're mowst welcome, Sven. If whatever Version of "the" McAfee contains
an antispyware component, [the Versions installed by OEMs usually are
suites that do include this ] then Windows Defender should have been
disabled when McAfee was installed.
IF that is the situation, then you can turn WD off manually:
http://www.vista4beginners.com/How-t...ndows-Defender



MowGreen [MVP 2003-2009]
===============
*-343-* FDNY
Never Forgotten
===============



Sven Pran wrote:

I'm having the same problem on
1. a brand new laptop bought last night.
2. a pc that I just reinstalled Windows Vista on.
Both have McAfee installed and fresh Vista install. I will follow the
notes in the article to manually turn off WD.

But my question is, if I do this, how do I get to the Startup to turn things
on or off that I don't want to start on reboot? Is there another means to
get to this? If there is, then I have no problem turning WD off, but if
there isn't then I need to resolve the error.

Thank you
Christine


"MowGreen [MVP]" <mowgreen@xxxxxx> wrote in message
news:OFkeFPfnJHA.1492@xxxxxx

Ok, this article on how to turn off Windows Defender is not going to help
someone getting this error because you have to go into Windows Defender
according to the article to turn it off. If you are receiving this error,
then you cannot open Windows Defender.

Need another plan....

Thank you
Christine


"MowGreen [MVP]" <mowgreen@xxxxxx> wrote in message
news:OFkeFPfnJHA.1492@xxxxxx