Search performance was something Windows 7 improved but over time results can get slower to appear on the Start menu as you type better multi-threading support for indexing and search could help keep that fast even as the number of items on your system grows - and we've seen search improvements in service packs before.

There are still some updates we'd like to see in Windows 7 beyond bug fixes.

Hotfixes are often available only directly from Microsoft support if you have the relevant setup and service packs include the updates with the underlying fixes service packs are the way those underlying fixes are distributed but again this is very much business as usual.

The pieces of SP2 you won't get in advance from automatic updates are what Microsoft calls hotfixes urgent fixes for bugs that only occur on specific systems with specific combinations of hardware and software that are only tested on those combinations so the Windows team can get them out quickly while they work on a fix for the underlying problem and test that on the full range of PCs. That makes rumours of a Windows 7 Service Pack 2 release date in the middle of 2012 plausible June would be another 16 months. The Windows 8 release date is still unconfirmed, but we're expecting an announcement and public access to a beta version at Microsoft's Professional Developer conference this September and that argues for the code being finished in the middle of 2012 and on sale before Christmas. Microsoft also tries to get the latest service pack for the previous version of Windows out before the new operating system (the timing means stability and performance fixes that have been developed and tested as part of the next version can be ported back to the previous code base where possible). Windows 7 went on sale in late October 2009 and SP1 came out in late February this year (exactly 16 months later). Just as new versions of Windows come every two to three years - 'we think somewhere between 24 and 36 months between releases is about right,' says Windows senior VP Steven Sinofsky - service packs come in between, every 12 to 18 months.

Windows 7 sp2 update