Yes, the hardware does support x64.
I managed to solve the problem. I downloaded windows again with the installer on a pc with x64 installed. And now it was the x64 version.
I also faced the same problem but i have not managed to solve yet; so should I also re download on a 64bit system? As i installed windows 8.1 pro on my new computer and it is 32bit... Also are we meant to deactivate the product key first or what? Sorry for all these questions but i really need 64bit version