The Snap Assist Interference
Windows 11 features a window management system called “Snap Assist.” If you click the title bar of a window and drag it slightly too close to the top or side edge of your monitor, Windows will instantly take control, expanding the window to fill exactly half or all of the screen. While this is great for organizing two documents side-by-side, it is incredibly annoying if you are simply trying to move a small floating calculator or a chat window out of the way. The aggressive snapping ruins your custom window layouts.
How to Disable Window Snapping
You can turn off Snap Assist entirely within the main Settings app, allowing you to drag windows anywhere you want—even half off the screen—without Windows 11 ever resizing them automatically.
1. Click the Start button, type Settings, and press Enter.
2. In the left-hand sidebar, click on System.
3. In the main pane, scroll down and click on Multitasking.
4. The very first option at the top will be a toggle switch labelled Snap windows.
5. Click the toggle switch to turn it completely Off.
Customizing Snap Assist (Without Disabling It)
If you actually like using the Windows Key + Arrow keys to snap windows, but you just hate when the mouse accidentally triggers it, you don’t have to disable the entire feature. Turn the Snap windows toggle back On, but click the small downward arrow next to it to expand the hidden options.
Untick the box labelled “Snap windows by dragging them to the edge of my screen.”
This provides the perfect compromise: your mouse can drag windows freely anywhere without interference, but your keyboard shortcuts will still perfectly arrange your screen when you explicitly ask for it.