I wrote a notepad doc for myself should I ever need to reinstall 10 in the future, and having noticed that this is a common problem for many different Dell models, I figured that I should share my solution with the community, so here it goes. After a lot of research, and trial and error, I finally got it installed and working.
The driver offered by Dell for my computer would not install on Windows 10 圆4. The device wasnt listed in Device Manager, or Settings, system tray, etc etc. I had the same 'no bluetooth device' problem on my Studio 1537.