I have not done anything about upgrading two machines (Windows 7.1 Ultimate & Windows 8.0) to Windows 10 short of having "Get Windows 10" in my system tray. Best practice is to image the Windows 7/8 disk & backup all data prior to downloading and installing Win 10. However, I do not really have the time or resources to do that prior to the 7/28 deadline in order to receive the free upgrade. I have read it is possible to install Win 10 and then roll the OS back to the respective earlier version, which the install app allows for up to 30 days. But that still means doing the recommended backups.
I have not read of a method to simply reserve, or reserve and download, Win 10 without installing it until past 7/28 and still get the free upgrade. Before trying to squeeze out some time to do this according to best practice (or simply having to pay $120 per copy after the deadline), I want to know if I've missed or misunderstood something that allows for reserving Win 10 but postponing the actual installation past the deadline without incurring a charge.
Thanks very much for the information.