Viruses, Trojans and Spyware: Protecting yourself.No user on the internet is safe from assault. Viruses, Trojans and Spyware can all effect your computer by placing annoying ads, tracking your credit card numbers, or even slow it down to a certain extent it is deemed no longer usable. By following through these simple steps, you can help protect yourself from the internet.High CPU Usage: If your computer seems to be slower than usual, it is very likely that you have been infected. Background ser.