Service Packs

My pc wants me to install SP1 (PowerPoint Viewer) and SP3 (XP).
Can someone tell me what these packs do, and why the are important.
Security implications would be of most interest

Thanks

PS. I run Vista 32bit

Why Service Packs are Important:
http://support.microsoft.com/sp

--
Carey Frisch
Microsoft MVP
Windows Desktop Experience -
Windows Vista Enthusiast

---------------------------------------------------------------

"species8350" <not_here.5.species8350@xoxy.net> wrote in message
news:56602384-ea2e-4c4e-9c6f-a608be008934@d77g2000hsb.googlegroups.com...
My pc wants me to install SP1 (PowerPoint Viewer) and SP3 (XP).
Can someone tell me what these packs do, and why the are important.
Security implications would be of most interest

Thanks

PS. I run Vista 32bit

On Aug 10, 4:05*am, "Carey Frisch [MVP]" <cnfri...@nospamgmail.com>
wrote:
> Why Service Packs are Important:http://support.microsoft.com/sp
>
> --
> Carey Frisch
> Microsoft MVP
> Windows Desktop Experience -
> Windows Vista Enthusiast
>
> ---------------------------------------------------------------
>
> "species8350" <not_here.5.species8...@xoxy.net> wrote in message
>
> news:56602384-ea2e-4c4e-9c6f-a608be008934@d77g2000hsb.googlegroups.com...
> My pc wants me to install SP1 (PowerPoint Viewer) and SP3 (XP).
> Can someone tell me what these packs do, and why the are important.
> Security implications would be of most interest
>
> Thanks
>
> PS. I run Vista 32bit

Thank you