If you don't use Flash, and don't have Flash installed on your computer, that MAY have been a false notice posted by an infected web site
You don't state whether or not you actually have Flash Player installed. If you do not have Flash Player installed, the update notification you received is not an official Flash Player update notification. With the exception of few caveats, mentioned below, Flash Player update notifications ONLY display if Flash Player is installed and the user has opted into the update option 'Notify me if an update is available' or 'Allow Adobe to install updates (recommended)'.
- If you have Chrome, Google embeds Flash Player in Chrome and all updates are distributed by Google. Updates occur silently via Chrome update or a Chrome Component Update. Separate update notifications for Flash Player for Chrome do not display.
- If you have Windows 8 and above, Microsoft embeds Flash Player in IE (and Edge on Windows 10) and all updates are distributed by Microsoft via Windows Update. Separate update notifications for Flash Player for IE/Edge do not display.
If in doubt whether or not the notification you received is official, close the notification window and navigate directly to https://get.adobe.com/flashplayer to download the installer.
Yes, Thank you so much. It just happened to me, I as well ran a scan with no threats but something is running on the back end becasue it's slowing down my computer. What a mess