New Windows Patch Proves Tricky The latest Microsoft Windows security flaw could result in more harm than usual because the company's system for fixing it could prove too vexing for some PC users to deal with, security experts warned. &lt;FONT face="verdana,MS Sans Serif,arial,helvetica" size="-2" color="#666666"&gt;&lt;B&gt;-washingtonpost.com&lt;/B&gt;&lt;/FONT&gt;