| Limitation | Explanation | |------------|-------------| | | Many trials require credit card info; charges begin automatically unless canceled before trial ends. | | Incomplete uninstallation | Some trial versions leave registry entries, services, or leftover drivers after removal. | | Limited time for evaluation | 14 days may be insufficient to encounter a real malware event. | | Aggressive upgrade prompts | Pop-ups urging conversion to paid version during trial. | | No enterprise-grade features | Centralized management, endpoint detection and response (EDR) are excluded. |
| Model Type | Description | Examples | |------------|-------------|----------| | | All premium features unlocked for 14–30 days | Norton 360, McAfee Total Protection | | Feature-limited (permanent) | Basic protection forever; advanced features locked | Avast One Essential, Bitdefender Free | | Money-back guarantee as trial | Pay upfront, then request refund within 30 days | Kaspersky, ESET | | Device-limited trial | Full features but only on 1 device | Trend Micro | free trial version antivirus