1. Go back to factory conditions (system recovery) via the Dell prescribed method (most likely: starting with ctrl-F11 early during boot).
2. If still issues, call them for warranty. If no issues, it's solved.
By the way, what is "too slow"?
GoPro, Pixpro, or Ricoh?
You can spend hundreds or even thousands of dollars on a 360-degree camera. We tested three of them to find out what kind of quality and ease of use you can expect at each price point.