Hi,
2. Many programs keep track of the size and position when you close them, and when you reopen them they open in the same place. You said you don't have a second monitor anymore, therefore I assume that you did and the last time you closed Notepad it was on the 2nd monitor.
1. Try this, hold down the shift key and right click on the taskbar button for Notepad and select Move. Then press the right arrow key until you see notepad back on screen, then press Enter. If that doesn't work, try the left arrow key.
You can try this on a different Window first (one already showing on screen) to make sure you understand how it works.