Open Mouse in Control Panel.
On the Pointer Options tab, under Snap To, select Automatically move pointer to the default button in a dialog box.
To open Mouse, click Start, click Control Panel, click Printers and Other Hardware, and then click Mouse.
If you turn on Snap To, the mouse pointer automatically moves over the default button (such as OK or Apply) when you open a dialog box.
Change the number of mouse clicks required to open items
Adjust the speed of your mouse pointer