subject: Different Computer Security Threats [print this page] When it comes to surfing the internet, you just shouldn't download anything! In all honesty you need to make sure that the website where you download a file from is legitimate. If you have wrongfully downloaded a malicious file, you are exposing your computer to a lot of security threats. If a pop-up box appears on your screen, you should not click it. This will help your computer stay virus free.