Right-click the desktop, point to Arrange Icons By, and then click Align to Grid.
A check mark appears next to Align to Grid when it is turned on.
To open Display, click Start, click Control Panel, click Appearance and Themes, and then click Display.
When the invisible desktop grid is turned on, icons snap into alignment whenever you move them, giving your desktop a cleaner look.
Rename a desktop icon
Add a desktop icon
Arrange your desktop icons
Remove unused desktop icons