I was on the Inside Program - suppose I still am but deleted the build as it slowed my antique E6300 to a crawl!
I managed to download & install w10 - I clicked on the reserved email FAQ link and hey presto.... W7 replaced with a rather uninspiring W10.
Notable problems I had were no sound, this I traced to the Realtek device manager, for some reason W10 does not copy over the sound card settings for the speakers.. The other is that clicking on Edge, or the feedback link, there is a noticeable delay before anything happens and then a further delay whilst the screen "thinks"...
Updated my AMD Catalyst driver and I am asked to do a reboot to finish off the update, [censored] this must have been the longest ever - 35 minutes following the restart before I could get on and use the PC. What a waste of time.
Oh and one more thing - have a look in your update history - I had 4 Security updates within the first 2 hrs (if you can call it that) of use. I'll be rolling back to w7 very soon and when I pass this antique on to my kids to use, I'll be running a Linux distro on my new box.
Steve