How do you know if you have a Trojan virus?

Answer 1

Some trojan horse viruses are more easy to spot than others. Easy signs of a trojan include but aren't limited to:

• Fake viral programs that contain spelling errors or is associated with an unknown company
• Computer becomes very slow over a short period of time (even under a small workload)
• Constant pop-ups that seem suspicious
• Longer start-up and shutdown times
• More spam mail (less used tactic, but if you see an email for Viagra or Cialis DON'T open it)

Other signs that are more difficult to spot out are:

• Unusual load time for a commonly used webpage (like Google, MSN, Facebook, or Bing)
• Random permissions from an unknown program through Microsoft's UAC control (for Windows Vista and Windows 7 operating systems)

Some words of advice:

• Use a reliable antivirus program (I personally recommend Avast)
• DON'T download anything from an unreliable source