DTU
Prevent the Windows taskbar from appearing on the tablet
The DTU acts as an extension or duplicate of the Windows desktop and functions in the same way as a second monitor.
This means that it can be treated in the same way as a second monitor when it comes to managing various aspects of the Windows desktop.
Windows 7
On Windows 7 the taskbar is not normally displayed on a secondary monitor configured to act as a desktop extension.
Third-party software is required if you want one to display one - there are various applications available on-line including Actual Multiple Monitors which is recommended by DisplayLink.
Windows 8
See http://www.eightforums.com/tutorials/5552-taskbar-hide-show-multiple-displays-windows-8-a.html
Windows 10
See: http://www.tenforums.com/tutorials/3899-taskbar-hide-show-multiple-displays-windows-10-a.html
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