Thanks for your reply cyborgamine. What I was thinking was: I have slipstreamed SP3 onto my Win XP CD and at some point in time (just after the release of SP3) no additional updates / hotfixes / patches were available because all previous released updates / hotfixes / patches were included in SP3. But now, 6 months later, additional updates have come out which is not included in SP3. So, does the Windows XP x86 2008-08-12 6836 windows-xp-x86-enu.ulz Update List contain all the updates released after SP3? Thanks Wuhtzu