Hi.
It may cause some problem on "older" PC's and also there
is a lot of software listed on MS web who don't seem to
be compatible to SP2. Many fixes for such software are
downloadable.
I've experienced problem to boot up after install SP2 on
a friends PC because of software who did not like SP2 at
all, but it was very easy to uninstall SP2 in "safe mode"
and the PC was back exactly as before.
We're running SP2 on several PCs and Laptops without any
problem at all, in fact it seems to run even more stable
than ever, not seen a blue screen or a crash for months.
As we've seen many times here at the SZ forums, they say:
"If it aint broke, don't fix it".
Maybe a good idea, but myself I've always have to try out
new stuff whatever happens.
Cheers
GJ