Hi neyuru, If you are reinstalling from an dell cd/dvd, then I would recommend that you follow dell instructions. If you are installing from an retail disc, then the drivers are going to be on the disc, so it is safe to add your service packs.
As viewed here: [URL] dell recommends installing the drivers first and then, installing critical updates (I think ServicePacks are one of them), but Intel recommends the other way around: [URL] so... I'm confused... which is the best method? (I will be reinstalling Windows Vista 64)   thanks
Which is first? ServicePacks or drivers when reinstalling?