Group of Cities, Counties Sues Microsoft  SAN FRANCISCO (Reuters) - A group of California cities and  counties on Friday filed a class action lawsuit against  Microsoft Corp.&lt;A HREF="http://www.investor.reuters.com/FullQuote.aspx?ticker=MSFT.O target=/stocks/quickinfo/fullquote"&gt;MSFT.O&lt;/A&gt;, saying that the world's largest  software maker overcharged government agencies for software.