If touch input is available on your computer, you can use the touch pointer to accomplish tasks that are difficult to perform with just your finger, such as targeting small objects on the screen. You can turn on the touch pointer when you need it and turn it off when you don't. For example, you can turn on the touch pointer to tap the Close button on a window and turn it off to browse through e-mail messages.
Open Pen and Input Devices by tapping the Start button , tapping Control Panel, tapping Mobile PC, and then tapping Pen and Input Devices.
Tap the Touch tab.
Under Touch Pointer, select or clear the Show the touch pointer when I’m interacting with items on the screen check box.
Use your finger to press and hold the taskbar.
Point to Toolbars, and then tap Touch Pointer.
To turn the touch pointer on or off, tap the Touch Pointer icon on the taskbar.