Hi RobbieB,
You may make changes to the system BIOS, that should help. Please follow the steps below:
- Power on the system and tap <F2> 3-4 times at Dell logo.
- System Setup Utility will open up.
- Go to ‘Onboard Devices’ at left hand side
- Go to ‘USB controller’
- Set it on ‘No Boot’ option.
- Press <Esc> to ‘Save Changes and Exit’
Keep me posted with the results. I will be glad to assist.