We recommend you install Malwarebytes Anti-Malware (Free) as a backup antivirus program and run Malwarebytes Anti-Malware monthly.
Malwarebytes Anti-Malware is an easy-to-use anti-malware application available in both a Free. The Free version is well-known for its detection and removal capabilities. Additionally, Malwarebytes offers a host of extra utilities as well as an approachable forum community to help you combat any piece of malware that exists in the wild.
HOW TO USE-Malwarebytes (Free) is a backup anti-virus program. If you are concerned that your main anti-virus program has been compromised, install Malwarebytes, then click on Scan, in the bottom right of the application window, allow Malwarebytes to update its database, and then it will do a full scan on your computer. Quarantine any items it detects.