Avast 6 released with AutoSandbox feature which on detection of suspicious program execution warns you to run it in the virtualized environment where you can open it in the Sandbox, or normally (if that application came from trusted source) or cancel the opening. You can exclude some safe files/applications from running in the Avast AutoSandbox so that you won’t have to experience this warning again, here is how.
Exclude Trusted files from being run in the Avast Sandbox
#1. Open Avast User interface from its tray icon
#2. Click on Additional Protection to expand, for AutoSandbox click on Settings on the right-pane
#3. Now browse for that program executable and add it, do the same for files you want to exclude from Avast Auto Sandboxing.