Hello Webgirl,
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.
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I hope this post is helpful.
Let us know how it works ºut.
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"Webgirl" wrote:
Quote:
> Suddenly I get this message and Win Defender doesn't start.
> I tried to restore the system, but nothing changed
> I downloaded Defender from Microsoft's site in order to reinstall it, but it
> says Vista already contains Defender, so I don't need to install it.
> There is no way to disinstall it and re-install it, so how can I solve the
> problem?