The upgrade time for Windows 10 varies depending on your device and setup.
The upgrade time for Windows 10 varies depending on your device and setup.
The free upgrade icon will remain until you decide to upgrade or encounter a system issue. Windows 8.1 64-bit has limited support, so upgrading to Windows 10 is recommended for better stability and features. There isn’t a fixed expiration date for the upgrade process itself, but it depends on your hardware and available updates.
You have roughly until July next year to make the change. It’s a free upgrade for one year, with the launch on the 29th of July, so it should conclude around that time in 2016. There’s ample opportunity to upgrade.