Dow Slides to Year Low on Oil, Microsoft  NEW YORK (Reuters) - The blue-chip Dow closed at its lowest  point this year on Friday as oil prices climbed to another  record and 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; revenue forecast lagged  analysts' expectations.