Are you using avast Home?
Did you remove (uninstall) AVG before?
If you have an infection, send file to Chest is safer than to delete it…
You can check if the file is really infected or it’s not a false positive.
If it is indeed a false positive, add it to the exclusions lists (Standard Shield, Customize, Advanced and Program Settings, Exclusions) and check scan it periodically using the ashQuick scan (right click scan), when it is no longer detected then remove it from the exclusions.
Also see (Mini Sticky) False Positives