It is highly advisable to update the signatures from within the antivirus, if possible.This option is available in the tray context menu of AVG and ensures that the security software compares scan results to an up-to-date signature database, so as to detect both known and recent threats.
Having covered about AVG Rescue CD which can be a great helping tool for PC users having infected machines, AVG Rescue CD scans for viruses and removes them when Windows unable to boot from your computer, but for AVG portable version in CD to detect the latest threats, it must be updated by connecting to the internet in Linux environment, which may not feasible on offline computers.
It indeed helps offline users to fix infected machines with updated AVG which successfully removes the latest threats.
Also read How to Update AVG Offline & How to Update Avira Manually With Fusebundle Generator.
An up-to-date virus database is a critical component for any security software, on which the detection rate directly depends.
To ensure your AVG Antivirus provides full protection at all times, the AVG team analyzes new threats and information regarding new viruses, releasing updated virus definitions and antivirus improvements periodically.
The installer is suggestively called AVG Anti-Virus Definitions, which deploys the updated package of virus definitions that can be loaded into the AVG Antivirus when an Internet connection is not available or the built-in definition update function fails to work.Even if you have chosen other one, the system will be started properly (if previous procedure was followed properly) and screen not showed with next computer restart (startup). I chose that and my computer was restored back to how it was on Nov.Thank you I was able to fix this problem without downloading and using their recovery CD - here are the steps I took if you're familiar with the command line:- Hit F8 during startup and started System Recovery Mode (I think that's what it was called - first option)- Chose Command Prompt- Navigated to my Program Files (x86) directory (which surprisingly wasn't on C: but on E:)- Went into the avg/avg10 folder- rename avgrsa.bak- rename Voila! 28 (don't know why that date, but I saw someone else said the same thing). I heard some say that when they did this, since they had their AVG updates set to automatically update they had to maneuver quickly to the AVG thingy and disable the "automatic" part of it.One last step could be renaming whole AVG program folder (C:\Program files (x86)\AVG) to another name.What is the exact error message, what is showed during computer startup?Please accept our apologies for any inconveniences caused by this situation.