Windows Vista Service Pack 1

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Windows Vista Service Pack 1 (SP1) RTM'd last month and today it appeared as an available update on my Vista machines at home. Here it is...

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Details of notable changes (that's changes "focused on addressing specific reliability, performance, and compatibility issues, supporting new types of hardware, and adding support for several emerging standards"), including enhancements to XPS support, are documented in Notable changes in Windows Vista SP1.