Check your definitions version in Defender.

John Navas wrote:
> On Wed, 25 Jun 2008 00:51:27 -0400, "PA Bear [MS MVP]"
> <PABearMVP******.com> wrote in <egWiH9n1IHA.4004@TK2MSFTNGP03.phx.gbl>:
>
>> As John pointed out a few minutes ago, you can manually update Defender
>> on
>> 32-bit machines:
>>
>> 1. Go to http://www.microsoft.com/security/portal/ADL.aspx
>>
>> 2. Click on the link on the left side of the page to download/install the
>> new update. Do not use the link in the right-hand menu under "Latest
>> Definition Updates".
>>
>> The linked download appears to be a re-release of definitions v1.35.563.0
>> which were originally released on 19 Jun-08. Installing it will make
>> Defender "happy" again. <wink>
>
> As of this writing, the Definition version on
> <http://www.microsoft.com/security/portal/ADL.aspx> varies between
> 1.35.724.0 (doesn't work) and 1.35.744.0 (does work), probably because
> all load balancing servers haven't yet been updated to the later
> corrected version, so be sure to check the version before downloading.