Official-survey.co is malicious domain used by Cyber criminal to make revenue illegally. It pops up on your web browser like IE, chrome and Firefox once you unconsciously let threats invade your PC via free download programs, compromised websites you visited or suspicious Email you open. Google Safe Browsing has listed Official-survey.co as phishing website due to its harmful activities on distributing malware and stealing users information. Official-survey.co keeps redirecting your to its deceptive page that displays misleading system warnings about outdated software, security threats, system errors, and PC junks. For example, it claims that your IE / Chrome / Firefox is out of date and the new version it prepares for you could provide better performance. But the fact is the web browser update files from Official-survey.co will make everything perform terrible, because the update links are fake and will install rogue software and malware to your PC once click on them. In consequence, your web browser homepage may be changed by third party search engine, tons of advertisements will present on any website you open, you will be randomly redirected to scam websites that ask for ransom money, and your Internet access may even be blocked.