Wikipedia describes Malware as any software intentionally designed to cause damage to a computer, server or computer network.
PC Mag reports that the following are the most common signs that your computer has been infested with Malware.
Popup Ads Start Popping Up Everywhere
Your Browser Keeps Getting Redirected
An Unknown App Sends Scary Warnings
Mysterious Posts Appear on Your Social Media
You Get Ransom Demands
Your System Tools Are Disabled
In addition to having an anti-virus program (with the latest updates) installed in your computer, a strong malware program such as Malwarebytes must be installed as well.