Try installing every possible update from Windows Update. It worked for me.

Windows insider Gabriel Aul clarifies on clean installations of Windows 10
So you'll have to upgrade first and then if you want a clean installation you'll have to create an ISO of the OS or a bootable USB device. Something which can also be done on Windows 7 and 8.

Nice! this worked, now I have my reservation.
Thanks!

Reserved my ticket to planet 10.

I'm using the Windows 10 preview - and I have been virtually since it was announced - and I honestly don't get the hype. It's not that brilliant. I appreciate the start button, the visual layout... but beyond that, its actual performance hasn't impressed me much at all.

watch this be like Microsoft ME

I just got an email from Microsoft telling me "You've reserved Windows 10 - what's next?"

I actually cancelled my reservation because I have 3 laptops that have displayed the Get Windows logo so I'd rather download it once then download it three times.

Me neither tbh

So, tomorrow?

I'm ready

It sucks people who were in the Insider program got the final version 2 weeks ago

Does someone know when/if they're gonna release the .iso?

Ready!

If you signed up you will receive it as an update. You'll be able to create an .iso afterwards if you want to do a clean install.

Ew it has a start button?

This is a first.