FlashPlayer Infection

Hello–A full system scan revealed one infection in a FlashPlayer.dmg download. I moved this file to the Virus Chest. What now? Do I need to install another FlashPlayer from the Adobe web page? Should I delete the infected file from Virus Chest first? My iMac has High Sierra.

yesterday, i was search the web and suddenly a flash player upgrade flashed on the screen and i clicked. now i’m getting all sorts of strange pop ups (free zip accounts, mackeeper , safari pop up warnings). i’m not sure what has happened or what i should do. any suggestions would be appreciated.