Windows XP SP3 preview a fake Quote:
Microsoft has now responded to the situation, warning people against using the "preview." Mike Brannigan, an enterprise strategy and senior consultant at Microsoft, addressed the matter on the MS newsgroups, warning that "You would be well advised to stay clear of this FAKE SP3 package. It is NOT suitable for testing as it is NOT SP3."
But also:
Ethan Allen, the owner and operator of The Hotfix—the site distributing the "preview"—remained obstinate.

"Our pack is indeed a preview to what the official service pack will be, as these hotfixes will be in Service Pack 3 as proven by Microsoft's own knowledge base," he wrote. "Each of these hotfixes can be obtained for free from Microsoft by calling their support lines."