When I purchased my Dell PC in 2013, it came installed with Windows 8. Over the months I kept it up-to-date with fixes. I then installed the Windows 8.1 upgrade when it was available. Over the past month my OS has been damaged by some changes that I attempted on my own.
As of this time I am unable to access 'Change PC Settings' to effect any kind of recovery option. If I restart with F8 to try and get to a recovery prompt, F8 is just ignored. So, I have decided that my only choice is to perform a complete reinstall of Windows. I realize that I need to backup my files which is not a problem.
I access the Microsoft page 'Create installation media for Windows 8.1'. I then click on 'Windows 8.1 Setup'.
My problem is that the program will not accept my Product Key. I have verified my product key using several methods available on the web. I have also many times verified that I have entered the key correctly. The value I enter is always declared invalid.
I do not want to have to purchase a new copy of 8.1.
What are my option?