On the Pointer Options tab, under Motion, drag the slider.
To open Mouse, click Start, click Control Panel, click Printers and Other Hardware, and then click Mouse.
Adjusting the speed of your mouse pointer causes the pointer to respond more quickly or slowly to the movements of the mouse itself.
Select the Enhance pointer precision check box to provide finer control of your pointer at short distances without losing the ability to move the pointer quickly across the screen. Clear the check box to turn off this feature.
You can have the mouse snap to default buttons (such as OK or Apply) in dialog boxes by selecting Automatically move pointer to the default button in a dialog box under Snap To.