1. Go to the charm bar in win 8
2. Choose PC Settings at the bottom
3. Select the 'General' option and then go to the 'Advanced Startup' option
4. On the blue screen select troubleshoot, advanced options, startup settings - then select the restart option
5. Once the pc reboots you then have a choice of what you want it to do... Select the 7th option' Disable driver signature enforcement'
6. Once Win8 starts, repeat the driver process