Ok my problem has a few progressions so Im going to start from the beginning.
I first had this issue about a week ago when I started my xbox up in instant mode. The dashboard loads fine but my kinect keeps disconnecting then reconnecting. My control pad doesn't work either. So I contacted Xbox and was told to update my pads by plugging in a mini USB. This had no effect. I was then told to do a hard restart. This also had no effect. I unplugged the xbox and started from scratch. This worked fine but again after a day or two my xbox locked up with kinect disconnecting and reconnecting.
I disconnect the kinect sensor to see if this was the issue. Two days later the same thing happened again. Iv done a bit of research on the internet and it seems that the xbox fills its memory whilst in instant mode which causes the xbox to crash or shut down specific functions.
Therefore I have performed a factory reset and have now set my xbox to energy saving mode. Hopefully xbox will sort this out once windows 10 goes live but for now I will be sticking with Energy Saving Mode. If I have anymore issue i will keep this post updated :) If anyone has a similar issue feel free to post here.