I, too, am having the same issue. System was fine yesterday ... isn't today.
I have followed every step outlined in this thread ... even run the
/salvagerepository command MULTIPLE times with restarts ... no good ... I do
not have MS OneCare installed. I use Kapersky Anti-virus (Microsoft lists
this as one of the recommended products). Again, everything has been working
for months with no issues. Now, Windows security center shows Defender is off
and their is no anti-virus software installed. Defender itself shows it is
running, and Kapersky shows that it is running normally. Again, I have
followed every step suggested in this thread ... I'm still having problems.
Also, I tried to do a system restore and that failed as well with "The
writer experienced a transient error. If the backup process is retried, the
error may not reoccur (ox800452f3)".
Advice and additional help??
Jon
"Robinb" wrote:
Quote:
> also if you are running MS Onecare- it will turn off WD when running because
> part of once care has WD built in it
> robin
> "Bob" <bob@xxxxxx> wrote in message
> news:Y7idnf3Tr84rFnLanZ2dnUVZ_o-mnZ2d@xxxxxx Quote:
> > What firewall, anti-virus application or security suite is installed?
> > -------
> > *Report back, please*
> > [When responding to posts, please include the post(s) you are replying to
> > so that others may learn and benefit from the issue]
> >
> > [How to ask a question]
> > http://support.microsoft.com/kb/555375
> >
> > "Dan" <Dan@xxxxxx> wrote in message
> > news:06AD388F-1840-4C28-8475-D65F83D761DE@xxxxxx Quote:
> >>
> >> Did you resolve this issue as I've got exactly the same problem? Please
> >> let
> >> me know how you did it, step by step, please if it worked! Dan.
> >>
> >> "Hornet" wrote:
> >>
> >>> I have Windows Defender running normally on Windows Vista (the task-bar
> >>> icon
> >>> is showing that Defender is on and running ok) but the Security Center
> >>> is
> >>> telling me that Windows Defender is turned off and there is a button to
> >>> turn
> >>> it on. However, when I press the Turn On button (even though I know it
> >>> is
> >>> already turned on) I get the message: "Security Center is updating
> >>> definitions for Window Defender". After "searching for definitions" I
> >>> get
> >>> the message: "There are no new definitions available to download for
> >>> Windows
> >>> Defender". I'd like to solve this because the Security Center icon is
> >>> always
> >>> showing me that I have a Security Alert.
> > >
>
>