Virus software is a necessity today and if you don’t have any, you are vulnerable to all sorts of viruses that come to you via emails and web pages.
Offices should have centralized server-based virus software for ease of license management and virus file updates.
This free version is NOT available for commercial use but it is available for home users and highly recommended. You can download the Free AVG Antivirus at this link.
We also recommend using Malwarebytes for locating and removing Malware. Malware is different from a virus because YOU give it permission to install by clicking on a pop up or a place in a web page which has malware lurking. Malware is able to bypass normal virus checking because it mimics programs that you have installed.