Bluetooth disapeared from Device Manager on Windows 10

Hello. Today I tried to use Bluetooth on my computer Lenovo IdeaPad Y510p with Windows 10 but I don't see Bluetooth in Start > Devices. Then I've opened Device Manager and Bluetooth is not present nor "Other devices". What can I do?.
Thanks
ConsJMEAAsked:
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John HurstConnect With a Mentor Business Consultant (Owner)Commented:
If not in Device Manager at all ( not even red X not working)) then it has gone defective. You need to get the computer serviced. Windows 10 devices are detected automatically.

Try a full shutdown and start up to see. But the likelihood is you need it repaired
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McKnifeConnect With a Mentor Commented:
Check if it hasn't been turned off accidentally in the bios or by using a keyboard hotkey.
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John HurstBusiness Consultant (Owner)Commented:
I can turn my Bluetooth OFF, but it does not go away from Device Manager (neither of my two laptops).
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ConsJMEAAuthor Commented:
Thanks to all. I don't know the reason but at the fifth reboot (power off and power on) the Bluetooth is OK. The points to McKnife are because his comment gave to me more confidence to retry several times.
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John HurstBusiness Consultant (Owner)Commented:
Thanks. I do not know why it would take 5 shut downs and start ups. There may be an intermittent issue you should watch for.
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