Please do the following to update Firefox.<br><br> #Use Internet Explorer to [http://www.mozilla.com/en-US/firefox/fx/?ref=logo Download Firefox 4.0.1]<br><br> #When you see the prompt, choose "'''Save'''" and save it to your desktop.<br><br> #Then go to Add/Remove Programs, scroll down to "Mozilla Firefox" and remove it, choosing to keep your bookmarks, customizations etc., (''don't checkmark the box'').<br><br> #Then reboot and delete the folder called "Mozilla Firefox" at this location: C:\Program Files\Mozilla Firefox<br><br> #Finally run the installation file you downloaded to the desktop earlier.<br><br> ---- Your bookmarks, customizations etc., are maintained in a different location and will become available to you again once you complete the installation.<br><br> ---- I noticed your Flash installation is out of date which potentially exposes your system to exploits. See http://www.adobe.com/support/security/bulletins/apsb11-12.html Update it via http://get.adobe.com/flashplayer/

That indicates that you are using an add-on that is not compatible with Firefox 4. For details of how to troubleshoot this to find out what one is causing the problem see https://support.mozilla.com/kb/Troubleshooting+extensions+and+themes