WINDOWS PRODUCT KEY WINDOWS 8.1 64 BIT FOR FREE
WINDOWS PRODUCT KEY WINDOWS 8.1 64 BIT INSTALL

Download both the Windows 8 installer (Windows8-Setup.exe) and the Windows 8.1 installer (WindowsSetupBox.exe) from Microsoft's site. Please try again later.' is displayed forever no matter how many times you try. The generic key, although accepted as 'working' in the installer, won't start downloading the ISO - an error message citing 'We cannot connect now.

WINDOWS PRODUCT KEY WINDOWS 8.1 64 BIT FOR FREE

Microsoft really messed this up by not providing an official way to do a fresh installation from an ISO for free upgrades.

WINDOWS PRODUCT KEY WINDOWS 8.1 64 BIT INSTALL

Then why not just use the Store? Using the official method you end up with no install media, no product key and no way to use the built-in recovery later on ('missing files' error). Activate your Windows installation afterwards with your own Windows 8 key. Boot your system with the DVD you just burned, enter the same generic key to install and proceed on. Contrary to what Microsoft wants you to believe, you can use the generic key provided in this thread, download the ISO and burn it to a blank DVD from their own site. Microsoft's own server is IMHO far better than any torrent site. If you don't have access to an MSDN or Technet subscription or you're not a volume licence customer, the only way to get your hands on an ISO is to download it from somewhere else.

There is also an accompanying youtube video to the aforementioned step by step instructions that can be found alongside the full article entitled 'How to download the Windows 8.1 ISO using your Windows 8 retail key' here. You can install Windows 8.1 using the ISO or even burn it to a DVD or make a bootable USB thumb drive with the media.After the download is complete, you can save it as an ISO or create the USB media immediately.

You will now be downloading the Windows 8.1 ISO.

Now, re-launch the same Windows 8.1 installer.

Now, run the Windows 8.1 installer and you will notice that it will tell you 'download did not complete successfully' and that there was an 'element not found' error.

Once you pause the download at 1%, quit the installer. Do not quit the installer at the estimating time screen.

Once the download begins, immediately pause your download at 1%.

Once downloaded launch the Windows 8 installer and enter your product key when prompted to do so.

Download both the Windows 8 and Windows 8.1 setup installers from here.

Here are the steps that lets you download the Windows 8.1 ISO using a legitimate retail Windows 8 product key:

Windows product key windows 8.1 64 bit