I am using the product for shop users in a very dusty environment.  I have used fanless PC's in the past, but recently found these Kingdel machines.  I think they should advertise louder about the need for the user to purchase licensed software or install their own operating system.  I am using Windows 10 LTSB - 64-bit.  CPU is not speedy, but 8GB RAM and SSD drive boost performance nicely.  I will buy more!