Reserving a copy of Windows 10 inspiron 3451 14" Laptop

Hello I purchased a dell inspiron 14 3451 a couple of months back it has windows 8.1 and I installed the KB3035583 update sucessfully and there is GWX.EXE in windows system32 folder and restarted laptop  and yet still I am not getting the GWX.EXE running in the task manager or in my system tray next to the clock - any ideas. Thanks.