Window Vista Performance & Reliability Service Pack

Microsoft is still working on to release a Vista Performance and Reliability Pack. The pack will not available through Window Update yet, that doesn't mean it's not hiding elsewhere. Reportedly, the aforementioned pack and the Vista Compatibility and Reliability Pack will institute a number of welcome fixes and performance increases in a variety of areas like;
Increased compatibility with many video drivers.
Improved visual appearance of games with high intensity graphics.
Improved quality of playback for HD DVD and Blu-ray disks on large monitors.
Improved reliability for Internet Explorer when some third party toolbars are installed on Vista. Improved reliability of systems that were upgraded from XP to Vista.
Resolves an issue where creating AVI files on Vista may get corrupted.
Improves the performance of Vista's Memory Manager in specific customer scenarios and prevents some issues which may lead to memory corruption.