[KB2563] How do I know if my computer is infected with a virus or other malware?
Determining if your computer is infected by a virus or malware
Symptoms may not be malware-related
The examples listed below are common symptoms of malware, but your computer may exhibit many of these symptoms for legitimate reasons unrelated to malware, such as software or hardware incompatibilities or system instability.
Symptoms of malware affecting currently installed ESET products:
Your ESET product is disabled for no reason and cannot be restarted
A threat is discovered or the red ESET Threat Detected window keeps appearing
You receive frequent alerts from your ESET Personal firewall about an unknown program