My browser ends with a warning against a "faulty add-on"
If your browser closes with the note "This website was closed due to a faulty or malicious add-on" and maybe with a note to the "Data Execution Prevention", this means that one of your Internet plug-ins has crashed.
If this happens on a regular basis or if you cannot log in anymore at all, you should try the following steps:
*De-install your Java -if already installed- completely via Control Panel
- Go to http://www.java.com/en/ and install the most recent Java version
- Go to http://get.adobe.com/flashplayer/ and install the most recent Flash version
If it still does not want to work on your PC despite a new installation, you can also try to leave Java de-installed and remove the tip at "Use Java" under Settings -> Chat - however, games will not work any more then.