PC upgraded windows 8.1 to 10 not happening?

I have just upgraded pc and done a fresh install of windows.
Antec 1200 case. Cooler Master Hyper 212+ CPU cooler.
Vengeance LPX 16GB (2x8GB) DDR4 PC4-25600C16 3200MHz RAM
Crucial SSD MX100 512 GB . 500 GB HDD. 1200W PSU.
Gigabyte Z170X Gaming 7 motherboard.
Skylake Core i7 6700K CPU .

I using the media creation tool x64 but with not much joy.
Windows 10 seems to download
It then says something about cleaning up..then just goes back to 8.1 with nothing else happening.
I keep updating 8.1.
Will I get the icon up with the queue for windows 10 upgrade again? This worked with my old system?
This is a joke my pc main components are brand new. Should be easy peasy.

Download the Windows 10 ISO from here, delete your USB and use ISO to create it again.

Won't this method require a windows 10 key which I will not have?

No. You can use the ISO to upgrade your old Windows version to 10. This is done by starting the Setup from Windows. If you boot with the USB you cannot upgrade. You have to start Setup from previous Windows version. No key required in that case.

Does this mean I have to burn to a disk and boot as if I had windows 8 disc in?

brittas said:

Does this mean I have to burn to a disk and boot as if I had windows 8 disc in?

No, you will burn to a disk and insert the disk with Windows 8 running like if you were going to play a movie or music from it. Then you open the disk in windows explorer and run setup.exe on the disk.

Yes. Open the disk from Windows Explorer and double-click on Setup to start.

brittas said:

Does this mean I have to burn to a disk and boot as if I had windows 8 disc in?

You don't have to have the iso burnt to a DVD.
If you use the Media Creation Tool as you have mentioned, you should have the ISO file stored somewhere in your computer.
Right click at the iso file > click Mount > click Setup.exe.
Installation will begin.
You have the choice of keeping your files, settings and (most) apps, or keep nothing.
You will not be asked for product key as it is an upgrade installation over an existing qualified Windows OS, namely Win 8.1 in your case.
Activation will be automatic.

Great I will try all this later when I get home from work .

I am not sure, but you can mount the ISO (right-click and select Open with -> Windows Explorer) only in Windows 8 and 8.1 In Windows 7 you would have to use a third-party tool such as Daemon Tools Lite, but I wouldn't dare doing it and midway the upgrade Windows would not be able to read the files. I would rather copy all files to a folder in the hard disk and start setup from there to make sure.