It wasn't uninstalled completely.
Download the Flash Player uninstaller
Save it to your downloads folder - DO NOT run it yet.
Download the Adobe Flash Player installer directly by right clicking the following link and selecting "Save Target as".
Save the file to your downloads folder. DO NOT run it yet.
Reboot your system.
BEFORE running anything else, locate and run the uninstaller to completely remove Flash Player and then, run the installer to replace Flash Player.