Windows 10 will probably install the drivers.
If it is disabled, then enable the Bluetooth and reboot your system. Check your specification chart and check BIOS. Since different models have different configurations and settings, there is no single key combination that can be stated. To check the BIOS, you have to do some searching on the internet. The BIOS lets you know if the Bluetooth has been disabled by default. If you cannot find the Bluetooth Option in Windows 10, then first of all check the BIOS settings. Even though Microsoft has fixed the bug, but if you are still experiencing the same issue, then you can use some basic tips. For Windows 10, a bug arrived with one of the Builds that vanished the Bluetooth Menu. Bugs can arrive with Slow Ring Builds also. If you have enrolled in the Fast Ring, then the chance of getting a buggy Builds is extremely high.
Windows 10 sends updates and new Builds frequently.