Mohit Kapoor

Right-click Command Prompt and Run as Administrator. Type the following
command:

winmgmt /verifyrepository

If the system returns "WMI repository is not consistent", run this command:

winmgmt /salvagerepository

The first time you run this it will fail. (It will issue stop commands to
the services causing it to fail. It might take a couple minutes for the
services to shut down). Run the command again. You actually may have to
run it 3 times before it finally runs and completes on its own.

Reboot your system.

"Hornet" wrote:

> Can you give me more details and step by step instructions on what I have to
> do please. I'm not very IT literate.
> Thanks.
>
> "Mohit Kapoor" wrote:
>
> > Please perform the following to resolve your issues.
> >
> > Open elevated command prompt and type cd\windows\system32\wbem press enter
> >
> > Then type ren repository repository.old and press enter.
> >
> > Restart the computer and check your security center again hopefully
> > everything should be working there.
> >
> > Thanks and Regards
> >
> > Mohit Kapoor
> >
> > "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.