Lots of infore: sleep/hibernation, but nothing that seems to address the matter of Bluetooth disappearing from Settings after PC goes to sleep and then wakes up. I loaded both the Broadcom and Intel bluetooth drivers from earlier suggestion/links, but neither show up under Device Manager although each say they were appropriately installed. Ditto with reinstalling/updating Realtek driver. Driver For Realtek High Definition Audio Windows 10. which is the only one showing in Settings. Canon Mp630 Driver Windows 10. Interestingly, under Bluetooth (in the listing of all devices under Device Manager) four items now show - Magic Box II (my speaker); Microsoft Bluetooth Enumerator; Microsoft Bluetooth LE Enumerator; as well as the originally showing Realtek Bluetooth 4.0 Adapter.not sure where the first three came from as I'd not seen them before (although Magic Box II had been connected on prior uses). But again, they all disappear once PC goes to sleep and then later wakes up. Not sure what the Enumerator items are/what they are for.but obviously haven't made any difference re: 'the problem'. Can't believe I'm the only one ever having this issue with the Stream HP PC; unless no one else has used forums. Usb To Serial Converter Driver For Windows 10.