In Windows 10 we can easily maximize a window by dragging it to the corner of the screen, it is very useful to work in split-screen environment. It’s not a well-known feature, but one of the Windows 7 and 8 Ease of Access features is that you can make the mouse do a few extra tricks. The one you discovered is enabled by default and lets you drag any open application window to the top of your screen and then when you let it go, the window will change from sized to full screen. If you move it to the right or left edge it will open the windows to full-screen size vertically and half screen size horizontally.
We can do this to enable the keyboard actions and disable the automatic maximize:
- Open Run command by pressing Windows + R and type Control, hit enter this will open the control panel. In the control panel Look for Ease of Access Center. Click and open it.
- Go to “Make the mouse easier to use” and check the item “Prevent windows from being automatically arranged when moved to the edge of the screen.”.
3.Then go to “Make the keyboard easier to use” and uncheck the item “Prevent windows from being automatically arranged when moved to the edge of the screen.”. 
After applying the settings, if you drag the window to the edge of the screen, It will not automatically maximize.
