Dunno if you've done this, I would guess you may have after talking to Microsoft. But what I did to get win 10 was install win7 x64 ( prolly works same for x32 but you would have ram restrictions,) activate and installed drivers for everything. Dloaded drivers for win10 and put on seperate partition or thumb drive ( your lan driver is most importaint for this, but I would do all mobo and video drivers too.)
Then go to
https://www.microsoft.com/en-us/software-download/windows10Dload the tool (x64 for me)
Let it download, then click it open and it will lead you through the upgrade. If you do it any other way it will not upgrade for free, from what I found.