Windows Vista SP1 will be released as an update on Microsoft Update (MU) Catalog. The patch is very large and there is a bug in Windows Server 2003 in the WinVerifyTrust API that will cause signing validation to fail. What this means is that once you...( read more )...(
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Read the complete post at http://scug.be/blogs/sce/archive/2008/01/31/vista-sp1-will-be-distributed-via-microsoft-update-catalog-but-having-issues-in-sce.aspx