You first suspect your computer is infected for a reason. Malware can and will damage your computer, but you can minimize that damage by catching the threat and removing it from your PC in a timely manner. Spear phishing and other socially engineered attacks have become so sophisticated that hackers are very good at sneaking past security checkpoints. No one expects to deal with a computer infected with a malware, but even the most diligent and cyber savvy person makes mistakes.