Perhaps it could have something to do with power saving on your USB drivers. Check out the Oculus forums to compare symptoms and for guidance on how to disable power saving, via device manager.
It might also be worth checking that you have the latest BIOS/drivers for your motherboard. I had to do that with my motherboard.
Finally, to save us asking the question about your hardware/software setup in the future, it would be really useful if you could add those details to your forum signature.