Any one who owns Firetrust Benign(B9) software will have problems receiving emails after SP2 installed. The repsonce from firetrust:
If you have Windows XP Service Pack 2 (SP2) installed, then Microsoft advise they have a fix available, but you must contact them directly for the fix.
Click http://support.microsoft.com/?kbid=884020

Owners have to call Microsoft and talk to tech support to download the KB884020 fix. You can not download from the websight. Microsoft emails a link and password to you . Once installed Firetrust B9 will work again.

For those of you wondering what Firetrust B9 is? It scans your email for harmfull stuff / tracking, before you read it in outlook/outlook express.