They just love complicating simple things. Following is stolen from http://forum.xda-developers.com/showthread.php?t=2303046

The steps to install a unsigned driver on windows 8 is as follows.

1. From windows 8 control panel choose General –> Under “Advanced Startup” –> Restart now.

Now the system will restart and might take some minutes to show up the boot menu. Wait for It patiently.

After some time you will be prompted with a menu with following options.

1. Continue

2. Troubleshoot

3. Turn off

Choose Troubleshoot

Then the following menu appears.

Refresh your PC Reset your PC Advanced Options Choose Advanced Options

Then the following menu appears

System Restore System Image Recovery Automatic Repair Command Prompt Windows Startup settings Choose Windows Startup Settings, then Click Restart.

Now the computer will restart and the boot menu appears. Choose “Disable Driver signature Enforcement” from the menu. Now windows will start and you can do the installation of the driver that is not signed.