I have a floating icon at the top of my screen and it says menu. When I click on it. It drops down and gives me all these different options like overview, quick settings, enable, it also says that it can scan my phone and when I push that a blue bar comes down and scans. Keeps going amost like it`s rotating around and around and around. I tried everything to get rid of it. I`ve held it down it doesn`t move. I`ve tried to shut it down. Its still their. I've googled it and really couldn't find much. I did find a S8 that had kind of the same issue. I`ve even thought about doing a light factory reset, but I don`t know if I can do that or not.
Have you tried testing your device in safe mode to see if the icon still appears?
Press the Power key, touching and holding the Power off icon, and then touching the Safe Mode icon.
Awesome. That means it may be a third-party app that's causing this to appear. May I ask do you have a theme downloaded? If you do, Try switching to the default theme and see if that makes it disappear.
After checking the above suggested troubleshooting steps do you still experience this floating icon?
Try double checking your accessibility shortcuts in your settings.
Navigate to your settings > accessibility > and check every option there to make sure nothing is enabled.