My home PC is equipped with Windows 7 Service Pack 1 Premium (32-bit).
When I am surfing your avastWEBform <forum.avast.com> through Google Chrome v27.0.1453.116, I have the following error message recently:
"An error has occurred!
Sorry, Guest, you are banned for using this forum! This ban is not set to expire".
Same problem did occur to Mozilla Firefox v22.0 these few days, but I am glad to note that your website has been back to normal beyond my knowledge.
Will you please look into the matter? Any remedial action is highly appreciated.