Just wanted to share that I was surprised that I was able to downgrade back to 7 on my one computer. I recently bought a AMD FX-8300 3.3Ghz 8-core for a system that had just a Athlon II x2 215 2.7Ghz because I wanted an additional system to my AMD FX-8350, but one that was a little more power efficient and cheaper, so I got the FX-8300 for $119.99 for it.
This system was put into storage after doing the Windows 10 free upgrade from 7. I did this free upgrade about 3 months ago. I was able to swap out the Athlon II x2 215 2.7Ghz with the AMD FX-8300 x8 3.3Ghz and surprisingly it didnt break the Windows 10 activation. As well as when i had 10 running on this system i realized that... you know what.... I wil take the free upgrade to 10 on a weaker computer of mine that I will put into storage and downgrade this one back to 7.
But would it downgrade after it was upgraded to 10 and then shortly after shut down and put into storage. I booted it up and Windows 10 worked like a charm, went to system restore and saw the option to downgrade back to 7. Figured click and see if it will tell me sorry charlie too late or will it revert back to 7. Surprisingly it reverted back to 7 and quite quickly with the 90GB SSD drive and 8-core processor to process this downgrade. Just 1 reboot after reverting and 7 is running happy and FASTTTT on that 8-core with SSD.
I have a 240GB SSD that I will be putting into it and pulling the 90GB out of it after I clone the 90GB to the 240GB SSD.
Just wanted to share that it seems as though the 30-day period might not apply if the computer wasnt used for more than a specific period of time, because it sat for 3 months and it allowed the downgrade. Thinking I used Windows 10 on it for less than an hour probably. Maybe there are 2 triggers. A first trigger of it having to run for so long before the 30-day trigger applies for lockout of downgrade.
Not sure if anyone has experienced the lock out yet after 30 days and being trapped with 10 or not? Maybe I got really lucky with this one.
Looking online I saw this neat trick to avoid the 30-day lockout, but I never went through any avoiding of the lockout, I guess whatever routine that performs the wipe of these backup files didnt trigger to dump them and thats why it still worked...
http://www.thewindowsclub.com/rollback-windows-10-after-30-daysI also ran Never 10 on this system after and dumped all the Windows 10 data about 5GB. This will prevent 10 from reinstalling itself.