The Windows 8 Pro key that my brother got from Dreamspark did not allow his copy to install the 8.1 update. In order to rectify that, he gave me a Windows 8.1 ISO and license and that was the end of it.
But that’s such a waste isn’t? We had a couple of Windows 8 keys that should still be valid but thanks to Microsoft’s ridiculous restrictions, we weren’t able to install their 8.1 update. There had to be better way and thus I searched for answers and I found a guide.
Here’s an excerpt:
1. Download the Windows 8.1 ISO
2. Create ei.cfg file in the sources directory with one of the following entries:
For Windows 8:
For Windows 8 Pro
3. Install Windows 8.1 with the Windows 8 as normal.
That’s it and that should work. I haven’t tried the final step yet but I will report back as soon as I do.