Avast antivirus is the best security software and is designed by keeping the advanced growing malware in mind. It is effective in fighting against malware. But there is a fact that no security provides 100% protection against malware. Well, Avast provides excellent protection against malware and it comes with amazing features that keep your device safe and also enhances the performance of your system. When your device is responding slowly then, it might be possible that your device is infected with malware. In that case, use Avast to conduct a malware scan of your device.