Stocks Resume Rally, Dell Boosts Techs  NEW YORK (Reuters) - U.S. stocks rallied further on Friday,  led by computer maker Dell Inc. &lt;A HREF="http://www.investor.reuters.com/FullQuote.aspx?ticker=DELL.O target=/stocks/quickinfo/fullquote"&gt;DELL.O&lt;/A&gt;, a day after it  reported a higher quarterly profit and issued an optimistic  forecast.