Procedure to Update AVG Offline
First, get the latest virus definition updates from here using another computer that has internet access and put a copy of the virus definition file in a USB stick or a CD.Then, in the computer that does not have an internet connection but has the AVG antivirus software that has to be updated offline, right click on the system tray icon for AVG and click รข€˜Open AVG User Interface’. The AVG Antivirus Window should open up.
In the menu bar, choose Tools > Update from directory to update AVG offline.
A new window pops up. Choose the folder where the virus definitions are located. Click OK. AVG will use this file to update its virus database offline.
When the offline update is complete, AVG will show a confirmation, as shown below. You’re done.
So that’s how you can update AVG offline. If you’ve got any questions, feel free to post them in the comments.