Problem upgrading to windows10. Tried everything on the internet !!

Please need help. I'm tiered calling MS support.

I am having a Sony Vaio 15137 e series came with win 8 os. I updated it to windows 8.1 when its launched. And a few days before I reset It to windows 8.
Now I tried upgrading it to windows 10 but failed. Later according to MS Support I tried using media creation tool for downloading windows 10 ISO. My windows 8 was single language pack. So as directed by them, I chose following options for downloading ISO.
Language- English US
Version- Windows 10
Architecture 64bit
I mounted ISO file and first option came was whether to check for updates or not. And next step asking for a product key. Which is not required for free upgrade I believe. There was no option to chose upgrade or clean install.
What could be the problem. Is it because I failed to reserve.? I don't see an upgrade logo in my system tray.

Hi mike. Thankyou for your reply. I tried the same still it doesn't work.

Try the "upgrade this PC now" option of the media creation tool.

Download the Windows 10 ISO from Microsoft Tech Bench. Since you have Windows 8.1 Single Language version, you probably need to download the Single Language to be able to upgrade. If you download the "Windows 10" version it is different and cannot upgrade a Single Language. Also make sure you download the "English" (English US) language, because "English International" is English GB and cannot upgrade English US Windows. It has to be the same version, same language and of course same bit (32 or 64) to allow you to upgrade. To make it faster and avoid any issues, clear the "Search for updates" box during setup.