Satellite P50T-A - Bluetooth not working in Win 8.1

Since I bought my Toshiba Satellite P50t-A-125 laptop 2 weeks ago I have had problems with the bluetooth. My mouse kept disconnecting and I had to unpair and pair again over and over again to get it to work. The bluetooth device itself in the laptop kept disappearing from the device manager and somehow I managed to get it back again by re-installing the drivers.
However, now whatever I do I cannot get the bluetooth device to appear again in Device Manager. I have searched for new devices but it doesn't find it. There is now an Unknown USB Device (Device Descriptor Request Failed) showing under USB controllers. I update the drivers but it says they are up to date.
I have tried searching online and seen lots of people having this issue with Windows 8.1 and all the solutions I've tried don't make a difference. My laptop came with Windows 8.1 pre-installed so I would have thought that Toshiba would have made sure that bluetooth would work under Windows 8.1 before making them available for sale but obviously not.
Any idea on how to add bluetooth back into device manager?

Despite restarting my laptop over and over again yesterday and downloading drivers and updates nothing fixed it. I gave up and found an old USB mouse and ignored the bluetooth problem.
Today, seemingly at random the bluetooth is back in the device manager again even though I did nothing different today than I had already tried yesterday.
Now that it is back I was able to untick the power management settings of allow the computer to turn off this device to save power(as has been suggested online) and so far (fingers crossed) it has remained stable except for once it stopped working briefly.
I still don't understand why it vanished from the device manager in the first place or why it has reappeared without doing anything.
There is clearly something seriously wrong with bluetooth under Windows 8.1

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