It will help to plug in an external USB mouse until you get the drivers installed.

1.  Navigate to device manager (Right click on Windows 8 Start Screen and choose All Apps)

2.  You will see two devices (they might be called TrackPad) with yellow symbols next to them under Human Interface Devices

3.  Right click one of them and click properties

4.  Go to Driver section and click update driver

5.  Click browse my computer for driver software

6.  Click Let me pick from a list of device drivers on my computer

7.  Choose USB input device.  It will install.

8.  Do the same for the other device

9.  Go back to update driver (for two devices) and choose search automatically for updated driver software.  This changes USB input device to the correct hardware and enables multi-touch.

10.  Do the same for the other device

You shouldn’t have to restart but it never hurts.  Your trackpad should work fine.