Microsoft warns users against using vLite
@ 2008/02/04Is Microsoft waving their finger in disapproval at people looking to slim down Vista? That seems to be what is happening as many people frustrated with Vista's slowness turn to third-party utilities to speed things up. In particular, a program called vLite has earned a bit of fame by allowing people to make their Vista installations more lightweight, removing unwanted components and implementing various speed tweaks.
It was all caused by the Security Center removal. So keep that component if you use this SP3 build until the next update. Previous builds worked fine.
Unfortunatelly that is not possible, nor it was ever expected to be because Service Pack is meant to update the whole installation, if it detects that something is missing it aborts.
>> this is the reason why Microsoft discourages use of vLite