These has caused me a lot of grief. So far tried it on 12 machines and none of them would boot up afterwards. They all hung at Applying Computer Settings (all on a Domain). I had to uninstall in safe mode. As a test I reformatted one of them and tried it on a the now clean machine, and had no problems. So there was something on these machines it didn't like.
i got SP3 and it caused nothing but trouble when connecting to internet, and trying to upload to web site. connection kept dropping. Solution get rid of it and just down load the updates instead problem solved.