How can I remove the voice 'Threat has been detected" when a threat is found?
Are there skins for Avast 5? What are the limitations in Avast Free Version 5?
Hemanth
limitations ??? what sort of limitations? for the voice, search the interface, it’s there 
Settings > Sounds to control what is said by avast.
Comparison between free and pro versions of avast are in the website.
how about the skins?
avast 5 is not skinable.