I have opened the Thinkvantage Toolbox, went into settings and unchecked the the box next to: Show Lenovo ThinkVantage Toolbox Status Icon in the task bar, and clicked save. So now every time I open up the settings, the box shows as unchecked.
However every time after I restart the computer it comes back. Why does it still keep coming back?
Solution below is a temporary workaround.
Go to C:\Program Files\PC-Doctor
Look for file "PcdToolbar584923.dll" then rename it to "PcdToolbar584923.original.dll"
This will prevent Windows from finding the toolbar file which will cause the toolbar not to load.