I downloaded AVG Anti Virus on one computer and tried to copy it to a stand alone computer but it says that I need to connect to the internet.
Is there a way to bypass the proxy and the need of internet connection?
Despite what Jay says, you do not need to download and reinstall a fresh version of the AVG app to keep it updated.
After you've installed AVG using the offline installer Jay linked to, once a week or so, download definition update files to keep the antivirus software up to date and scanning for the most recent viruses.
Is the installer you are using the offline installer or the online one? The offline one should be around ~
Do note that to update your virus definitions at a later date, you would need to download the update definitions as mentioned by