O ok. What you are going to want to do is:
1. Right click on your desktop and select "Properties"
2. Select the "Settings" tab.
3. Right click on the second monitor displayed and select "Attached".
4. Then adjust the resolution as needed.
5. Finally, select "Apply" and it should work![]()
A quick test to see if your computer is running in dual screen mode, try and move your mouse off each edge of the screen. Does it stop when it gets to the very top/bottom/sides or does it keep going and you cant see it?