- Have you updated your web browser lately?
I update firefox periodicaly, but i never have problem with the chat before even I updated

- Have you tried clearing your web browser's cache?
I do that too every day, but never have problem with the chat before until now

- Have you changed your internet service provider lately?
No I have not

- Have you tried using a different web browser to access chat? What was the outcome?
I almost never use IE now, but I did just for this time, and still the result is the same.

- Have you recently installed or updated virus software on your computer?
McAfee update itself periodically, but if it's something they think it's danger, they would have indicated

- Have you recently installed or updated malware software on your computer?
no.