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In one of the keynotes of the Microsoft PDC 2010 or 2011, Top-manager Ballmer, or Sinofsky , or someone else, said that IE9 was so important to Microsoft that they will put a lot of effort into the IE9 release. They were thinking about "forcing" users with IE8, i.e. Vista users, to upgrade to IE9.

He also said that "selected Windows 7 technologies" will be bundled with the IE9 installation (so you cannot install IE9 and IE8 side-by-side). I wonder which technologies these are? Is IE9 a substantial upgrade, or kind of a "hidden" service pack for Vista?

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I wouldn't expect anything to fantastic, Vista is the black sheep no one talks about. If you really want to see, load Vista into a virtual machine and install IE9, at this point IE9 is listed as an important upgrade for Vista and 7, since Win 8 comes w/ IE 10..... Vista is unlikely to get more updates down the line. – BigHomie Jan 31 '13 at 14:41
@MDMoore313 I like Vista, with all service packs and windows-updates installed it is now good enough for me and home use. It was bad/or immature when it came out. UserAccountControl was new, kept popping up for no apparent reason. Very annoying. But these days Vista runs just fine. – knb Jan 31 '13 at 15:50
up vote 1 down vote accepted

You can get DirectX 11, Direct2D, Windows Imaging Component Improvements and Windows Ribbon component.

MSFT created a document about all improvements:

About Platform Update for Windows Vista (Windows)

You can also get Powershell 2.0 back to Vista if you want it (but this is not related to IE9).

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Thanks. According to Tim Mintner's Blog, a Powerhshell one-liner to check if Platform Update for Vista is installed is $wu = new-object -com "Microsoft.Update.Searcher";$totalupdates = $wu.GetTotalHistoryCount(); $wu.QueryHistory(0,$totalupdates) | where { $_.Title -match "Plat" } | select Title, Date – knb Feb 2 '13 at 9:00

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