Why can’t I drag anything to my second monitor?
To fix this issue, Right Click on your Desktop and choose Display Settings. When you do this, you will be able to see and identify which monitor windows think is the #1, and which is the #2. Once you see it, and identify that it is not correct, go to Advanced Settings and re-arrange the two monitors correctly.
How do I drag things to my second monitor?
How do I drag a window to another monitor?
Drag the application to the right or left edge of the screen, depending on your monitor configuration. You should start to see the edge of the application appear in your second monitor.