Hi AllanwLewis,
Thank you for reaching out to Microsoft Community.
When you say Bluetooth and Wi-Fi do not work, does it give you an error message in attempting to use these options or the options for Wi-Fi and Bluetooth is not present at all in Windows Settings?
Please try to boot your Surface Pro 6 first on the UEFI screen. You may check this page for the steps on How to get to the UEFI settings. Once you are on the UEFI screen, please choose Devices. Under Devices, look for the Wi-Fi and Bluetooth option and check if they are enabled (Enable if not). If they are enabled already, disable them first then back to enable after a few seconds. After doing those steps, just choose Exit > Restart now. After the restart, test the Wi-Fi and Bluetooth of the device again.
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Kind Regards,
Marrion Y.