Additionally, a slew of will be corrected in the update, including some slow shutdown problems and other crash-causing issues.
You have to have SP1 installed before you begin.
Like most Microsoft Service Packs, SP2 won't work on your system if you haven't already installed SP1. If you're thinking about trying the SP2 upgrade, you'll have to hit SP1 first.
Things may not be totally smooth at first.
Microsoft has with glitches seemingly caused by its Windows Service Pack updates. It sometimes takes several hotfixes for these kinks to be worked out. That's precisely why it's often best to wait for the full release, at the very least, before jumping on the upgrade.