What we know about Windows 8 is still incomplete and unofficial - garnered from job postings, rumours and the slides allegedly leaked by a software engineer at HP responsible for OEM relations (available through the Italian Windows Ette site). The slides include plenty of marketing ideas rather than technical details, they show that Microsoft has its eye on what Apple is doing to make its operating systems so popular and they declare themselves a work in progress. Not only is every page marked 'this is not a plan of record' but the opening discussion includes the line "reality: there are currently more ideas than there is time to implement them". That's especially true if Windows 8 release date is as soon as we think it might be. Windows 8 release date Windows 8, say the slides, will be available "for the holiday" - but not which one. There's a timeline that doesn't have many dates; the one suggesting that the coding would begin in June is suspect when some sources say the M1 (milestone 1 build) is already done and there's what we assume is a typo that we'd correct to say the third Forum (rather than the second) would be in July (there are several points where the slides are incomplete or confusing; for instance a pointed reference to "creating great Dell + Windows Experiences" in a deck that otherwise tips the hat - and appears to have been intended for - HP). It puts the first beta of IE9 in August, along with the shipping date for Windows Live wave 4 which fits other rumours and positions them just after the third Forum. That makes the forums three-to five months apart; assuming an average of four months - and assuming the chart is to scale and that the dates don't slip - that puts Windows 8 beta release date a little before March 2011 and Windows 8 RTM shortly after July 2011 (a date suggested on the blog of a now-ex Microsoft employee which you can find preserved , with the boxed version following in the autumn - for the holiday).

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Updated: Windows 8: everything you need to know