RE: Security Center says that Windows Defender is turned off

My Windows started to have similar problem yesterday. The Windows Security

Center showed Windows Defender is out of date. but after mannual update, I

received a message: "There are no new definitions available to download for

Windows." In Windows Defender, it states Real-time protection is on and

Definition version is 1.43.73.0 created on 9/4/2008.

I have tried Mohit Kapoor's solution, but have some problem as Grich had.

After I run winmgmt/verifyrepository, system responded "WMI repository is

consistent".

"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.