@@ -83,6 +83,8 @@ includes Tor?</a></li>

     </a></li>

     <li><a href="#SophosOnMac">I'm using the Sophos anti-virus

     software on my Mac, and Tor starts but I can't browse anywhere.</a></li>

+    <li><a href="#XPCOMError">When I open the Tor Browser Bundle I get an 

+error message from the browser: "Cannot load XPCOM".</a></li>

     <li><a href="#TBBOtherExtensions">Can I install other Firefox

     extensions? Which extensions should I avoid using?</a></li>

     <li><a href="#TBBJavaScriptEnabled">Why is NoScript configured to

@@ -1190,6 +1192,20 @@ this issue.

 <hr>

+<a id="XPCOMError"></a>

+<h3><a class="anchor" href="#XPCOMError">When I open the Tor Browser Bundle 

+I get an error message from the browser: "Cannot load XPCOM".</a></h3>

+

+<p>

+This <a 

+href="https://trac.torproject.org/projects/tor/ticket/10789">problem</a> is 

+specifically caused by the Webroot SecureAnywhere Antivirus software. 

+Consider switching to a different antivirus program. We encourage affected 

+Webroot users to contact Webroot support about this issue.

+ </p>

+

+<hr>

+

 <a id="TBBOtherExtensions"></a>

 <h3><a class="anchor" href="#TBBOtherExtensions">Can I install other

 Firefox extensions?</a></h3>