Microsoft Targets 2006 for Next Windows  SEATTLE (Reuters) - The next version of the Windows  operating system, Microsoft Corp.'s &lt;A HREF="http://www.reuters.co.uk/financeQuoteLookup.jhtml?ticker=MSFT.O qtype=sym infotype=info qcat=news"&gt;MSFT.O&lt;/A&gt; flagship product,  will ship in 2006, the world's largest software maker said on  Friday.