Comodo Scanner is a virus scan application that is used for detecting unknown threats such as malware, spyware, and ransomware on your computer. It is widely used to scan virus-infected files online. You need to have a standard Internet connection while scanning your computer through the Comodo Online Scanner app. It is available for both the Windows and Mac operating systems. Using the Comodo Scanner app, you can get live support. If you wish to download and install the Comodo Scanner on a Windows desktop, follow the below-mentioned steps.