A system without antivirus software is rare these days. An antivirus may protect your system from a virus or malware, but it doesn’t guarantee that your system cannot be infected. If you sense that your system is slowing down, programs are failing or some strange pop-ups are being generated, then your device is infected with a virus or a spyware of some sort. It is advisable to immediately seek help in such a situation. Here are few quick tips that you can try to rectify the problem yourself before you seek help.