"avast! 4 Home Edition works for 60 days after the installation in demo mode. You will obtain your FREE license key by E-mail after the registration. The license key is valid for 1 year. After one year you will need to just re-register." 1 év. 12 hónap. nem tudom te mikori informácioval rendelkezel régen valóbam 14 hónap volt de mikor én féléve regeltem akkor már csak 12.