What is the most dangerous computer virus and what does it do?

The most dangerous computer virus is the WannaCry ransomware virus. WannaCry encrypts a user’s files and demands a ransom be paid in order to decrypt and regain access to them. The virus has caused widespread damage, with estimates of over $4 billion in damages. Hospitals, businesses, and individual users have all been affected by WannaCry. The virus takes advantage of a vulnerability in Microsoft Windows and spreads quickly through networks. Once a system is infected, it will search for other vulnerable systems on the network and infect those as well. WannaCry has caused a great deal of disruption and damage, and is considered to be the most dangerous virus of 2017.

What are some of the most effective methods for preventing computer viruses?

There is no surefire way to prevent computer viruses, but there are some best practices that can help reduce your risk. Keep your software up to date, especially your operating system and any security software you have installed. Use only trusted sources for your software downloads, and don’t click on links or open attachments from untrustworthy sources. Be careful about what you plug into your computer, as USB drives and other external devices can often carry viruses. Finally, back up your important files on a regular basis in case you do contract a virus and need to restore your system.

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