Microsoft Files Seven New Spam Lawsuits &lt;p&gt;&lt;/p&gt;&lt;p&gt; SEATTLE (Reuters) - Microsoft Corp. &lt;MSFT.O&gt; filed sevenlawsuits against senders of spam, or unsolicited e-mail, fortransmitting messages without labeling them as sexuallyexplicit content, the world's largest software maker said onThursday.&lt;/p&gt;