Please use dell internal adapter, I upgraded OS to windows 10 pro and BIOS A09 there is not a single issue of wifi crash, Please log an Service request with Dell for wifi issue I hope you will get solution soon..
Thanks. I dont understand "use dell internal adapter". There is another external?
Honestly I dont trust very much Dell service, I fear having to stay a long period without computer and at the end receive it with no changes (in the best case....)