Yes, there is a good reason.
SP-2 is not compatible with all Prescott:
http://support.microsoft.com/?kbid=885627
Also see:
http://cquirke.mvps.org/sp2intel.htm
--
Jupiter Jones [MVP]
http://www3.telus.net/dandemar/
"Klaus Thane" <> wrote in message
news:30d201c4a4cb$2d6a8b10$...
> SP2 does not show up as an update all P4 prescott, Celeron
> and Celeron D systems I've built so far... What gives???
>
> Neither express nor custom will show it as an update nor
> will it auto download when schedule is set... I can pre-
> install SP2 but many of our customers have SP2phobia, so
> I'm letting them decide what they want.
>
> If there is a good reason for it, I'd atleast like to know
> why...