First you have to disable the McAfee internet security. Open McAfee internet security antivirus . Click Virus and Spyware Protection on the its main window. Click the option “Real-Time Scanning,” then turn it off. If it is not working then turn off permanently, and try out windows defender. It also has the option of setting an exceptions on scanning the downloaded files. You can also refer to the detailed solutions on how to fix failed virus detected error on chrome. Follow all the steps in sequence in order to apply the solution, but also take care of preventing your computer from actual viruses.