“Deceptive site ahead” error is a protective measure to warn computer users about an unsafe website. It can either be used for phishing purposes, contain malware and harmful programs or try to load scripts from unauthorized sources. It is important to understand that this alert is designed for your own safety. The websites which are hidden behind “Deceptive site ahead” message can claim that you have won a prize or lottery and ask to submit personal information. It can include your name, surname, email address, credit card details and other valuable data. Later, criminals use the information to swindle money from gullible and inexperienced computer users.