Peter143

I have been using windows for a very long time now but recently I'm facing a problem where it showed me that I have successfully uninstalled an application facebook but I can still see the application on my screen. I don't know what's the problem but whatever the reason may be it's been worrying me that it's a some kind of virus. I hope not but can someone help me out on this? I do not have any anti virus installed on my device so I need help as soon as possible.