Windows Snap To feature
Enable the Microsoft Window XP mouse Snap To feature to automatically focus on dialog box buttons. Enabling this feature will automatically move your mouse cursor to the default button on any dialog box that appears on Windows. This is a great way to save a little time and not have to move you mouse cursor to the "Ok" button each time a dialog box appears. To enable this feature follow the below steps.
1. Click Start, Settings, Control Panel.
2. Double-click the Mouse icon
3. In the Mouse Properties window click the Pointer Options tab and check the "Automatically move pointer to the default button in a dialog box" option.