Windows Defender (Vista) keep being told to Check for new definitions

[Dave Horne]

I am using Vista Home Premium, SP1, with the latest updates for WU and
Defender .... I think.

I see the orange oval with the black exclamation mark on the Windows
Defender System Tray icon and am asked to check for new definitions. I do,
there are no new definitions and yet I keep seeing that exclamation mark
advising me to do something.

I did a scan, rebooted the computer (even though I was not advised to do
so), and I still see this message.

Just me? Suggestions? Thanks, Dave Horne

 

[Dave Horne]

A follow up - I went to
http://www.microsoft.com/security/portal/ADL.aspx#top and manually updated
the program. That did the trick.

I never had to do this before. Has something changed? Will I now always
have to manually update Defender?

Thanks, Dave Horne

 

[PHX]

I'm running Vista Home SP1 with the latest MS updates and saw this 12/18 at
logon. I had to go to the recommended site and update manually also. The
only change to my system was the IE7 update on 12/17, but correlation is not
causation. I hope this was a one-time occurrence.

 

[Jim Moriarty]

Are you using a program similar to ccleaner which may be clearing out
the history for Defender?

That may be causing the problem, just a thought.

A wrong thought, but the effort is appreciated.