Holy crackers, what a horrible answer. Dell ... is this seriously the best you can do??   Dessie, go here, it is a thread on the Microsoft support site with lots of information on how to recover your system and get Windows 10 installed: [URL]  Good luck! I've an Inspiron One 2320 also and I am researching potential issues before I upgrade it. 
i have a Dell All In One 2320. when i tried to install windows 10 the whole system has stopped working. it is now giving me a Inaccessible Boot Device error. what can i do. it was working fine on windows 7.
Inspiron One 2320 AIO, Windows 10, inaccessible boot device error