I've checked AVG Free website and it appears to be working fine for me. Could you please click the following link and check whether the website is loaded?
If it is not possible to display the website in your browser, your DNS configuration could altered by a malicious software (which could be already removed, but the configuration was not reverted). Please see this AVG forum post, paragraph 4, for more information.
Please let us know results of your testing.
I am trying to install AVG Free. I have downloaded it from CNET but i cant install it due to a network error. I tried to then view the AVG website, but i get server not found. I have tried it on a number of computers and get the same result. I am able to view every other site on the Internet. Does anyone else have the same problem?