If you are having issues reserving windows 10, and have tried everything, look here for your solution:
"There is a community provided tool/script that will go through several means to fix the common issues. The link to this tool/script is buried on page 90 of this forum - but the easier way to find it is in the middle of this InfoWorld article - it's the dropbox link https://www.dropbox.com/s/0u0au9xgy6ss18p/win10fix_full.zip?dl=0 which is also referred to in the article below:
"There is a community provided tool/script that will go through several means to fix the common issues. The link to this tool/script is buried on page 90 of this forum - but the easier way to find it is in the middle of this InfoWorld article - it's the dropbox link https://www.dropbox.com/s/0u0au9xgy6ss18p/win10fix_full.zip?dl=0 which is also referred to in the article below:
Please note this tool is not officially from Microsoft is not sanctioned by them but it has been reviewed by me, is not malicious and certainly makes it easier to get the process done.
Additional comments by another poster that may help explain what's going on:
"When you run the batch file, upon clicking Selection 1, it not only checks that update KB3035583 is installed, but also KB 2952664.
Selection 2 (Quick Method #1 [JC from answers.microsoft.com]) which updated the registry is what fixed it for me instantly.
Selection 3 (Quick Method #2 [KevinStevens_845]) tries the GWX task, and says it could take up to 10 minutes for the icon to show up.
Selection 4 (Long Method #1 (Yaqub K's method)] says it could take from 10 to 40 or so minutes, and will continually loop, that is normal, but you shold keep seeing 'RUNNING' as it loops, and you may have to run Selection 4 (Yaqub's method) again for it to kick in.
ALSO, when you finally get the box to enter your email address for your confirmation, you may have to wait 5-10 minutes for it to arrive. Mine said "Congratulations on reserving your free upgrade to Windows 10" in the subject line.""
-Source: http://answers.microsoft.com/en-us/windows/forum/windows_10-win_upgrade/i-want-to-reserve-my-free-copy-of-windows-10-but-i/848b5cce-958b-49ae-a132-a999a883265b
This is a more condensed version of what I found when going into research, but as it says above, it is not by Microsoft. I selected the Dropbox link and option 2, and it worked just fine.
Many thanks,
Owen, Inevitable Tech Specs