Just 3 weeks ago I created the USB stick using Microsoft's Media Creation Kit and upgraded from W7 Pro to W10 Pro using well known methods from the web. Maybe this one.
No hunting around the web for me.
I have a Lenovo B50-30 laptop with Windows 8.1 on it.
I have tried for weeks to upgrade to Windows 10 or downgrade to Windows 7.
I have tried installations from different websites, nothing has worked. Not even Microsoft's Mediatool worked.
It they work at all, they show a progress bar and installing Windows, then when it's done, nothing has changed. I reset the laptop and still 8.1
I have been into the bios but I can't see multiple operating systems etc.
I have even downloaded iso's and burned them to disc and onto usb. (USB was extremely tempermental), I'm at a loss.