I used it have Avg Free edition and it did absolutely nothing, not even protect my system when it was infected with multiple Trojans and worms.But on the other hand Avast detected almost everything that Avg missed.

Let’s look at how many shields Avg free has:

*Resident shield
*Mail scanner

Let’s look at how many shields Avast home has:

*Resident shield
*Mail shield
*P2p shield
*Network shield
*Im shield
*Web shield
*Outlook shield

Avast also has more effective heuristics than Avg’s ineffective heuristics.

The only reason many people choose Avg free is that it’s light on memory and easier to use compared to Avast.