If you are referring to the Windows Media Player, just minimize the screen by clicking on the minus sign in the upper right-hand side.
right click on the task bar and make sure on the list the 'lock task bar' option is checked
Task bar.
You can recover your task bar and icons by by restoring a Windows' System Restore Point
task bar
Pin to task bar
You can have the most windows opened at a time on the task bar it would soon say when there are too much how much things are opened in 1 thing all on the taskbar
In Windows, the Task Bar typically contains the system clock.
task bar
The task bar on every WIndows computer is the bar at the bottom of your screen with a Windows logo on the left of it (the Start button) and the clock on the right.
Right click on the start menu task bar and click on cascade windows
drag it from explorer
The graphic tool bar that appears at the bottom of the Windows screen is called a task bar. This is a feature that was first introduced with Windows 95.