Y'all, I spent 2 days troubleshooting and goofing around with drivers, uninstalling, reinstalling, rolling back, enabling, disabling, re-enabling, rebooting, etc. and NOTHING WORKED -- UNTIL THIS!
Some genius saved me a ton of headache and lost hours by suggesting to literally unplug your device's power adapter from the PC/laptop, and *pushing the power button* a couple of times (with the unit off and unplugged) to "flush out built up power..." which was causing my bluetooth adapter to think it had a power failure. Crazy but that worked!!
Hope this helps.
https://answers.microsoft.com/en-us/windows/forum/all/intel-wireless-bluetooth-driver/4d7dedb6-4189-470c-963e-89072f6f08d5
"Solution:
Unplug power cord from computer and flush power by pressing and holding the power button."