Open Mouse in Control Panel.
On the Buttons tab, under ClickLock, select the Turn on ClickLock check box.
To change how long you need to hold down the mouse button to set ClickLock, click Settings.
To open Mouse, click Start, click Control Panel, click Printers and Other Hardware, and then click Mouse.
ClickLock enables you to select text or drag a file without having to continuously hold down the mouse button.
Adjust the double-click speed for your mouse
Change the number of mouse clicks required to open items