Microsoft Targets 2006 for Next Windows  SEATTLE (Reuters) - The next version of the Windows  operating system, Microsoft Corp.'s &lt;A HREF="http://www.investor.reuters.com/FullQuote.aspx?ticker=MSFT.O target=/stocks/quickinfo/fullquote"&gt;MSFT.O&lt;/A&gt; flagship product,  will ship in 2006, the world's largest software maker said on  Friday.