Please follow these steps in order to set up multiple monitors in Windows.

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Extending Displays

1. Right click on your desktop
2. Choose "Display settings"
3. Under the monitor graphic and next to the "Identify" button, there is a button with the options of "Duplicate these displays", "Extend these displays", and "Show only...[XX]".
4. Select "Extend these displays"
5. Select "Keep changes"

Duplicating Displays

1. Right click on your desktop
2. Choose "Display settings"
3. Under the monitor graphic and next to the "Identify" button, there is a button with the options of "Duplicate these displays", "Extend these displays", and "Show only...[XX]".
4. Select "Duplicate these displays"
5. Select "Keep changes"