| License Type | Typical Duration | Official Source | |--------------|------------------|------------------| | Free Antivirus | Unlimited (basic features) | Avast official site | | Internet Security | 1 year, 2 years, rarely 3 years | Avast store, Newegg, Amazon | | Family / Multi-device | Same durations | Avast official store | | Promotional / Giveaway | 6 months to 1 year | Authorized partners (e.g., SharewareOnSale, Giveaway Club) |