I'm not aware of any requirement--the defs still work with the previous
version, etc. The new version has some improvement in the help file.
However, theres a thread in another group where someone feels that careful
comparison testing indicates the newer build doing less well at detection
and cleaning than the older build--still being looked into to see if others
can see the same issue.
--
FAQ for Microsoft Antispyware:
http://www.geocities.com/marfer_mvp/FAQ_MSantispy.htm
"D@annyBoy" <(E-Mail Removed)> wrote in message
news:(E-Mail Removed)...
> do I really need to install the latest version .509?
> having no problems at the moment
>