Click the icon and an app will open advertising Windows 10 and inviting you to “reserve your free upgrade” – which means Windows 10 will download automatically, though you will still be able to control the time it installs (or presumably back out if you change your mind). The Get Windows 10 app only appears if you have Windows 7 SP1 or Windows 8.1 Update.
In addition, a system check runs to verify that your PC meets minimum system requirements and does not suffer from blocking issues, such as missing drivers.
But getting there will be impossible if users hang on to Windows 7, which will not run the new-style apps.
Note: The red spider shown in the screenshots indicate which button or item to click.Windows 10 previews get more polished with each build, but in terms of stability it is well behind where Windows 8 was in its final stages.That said, the upgrade is potentially more compelling for Windows 7 users than Windows 8 was, thanks to new features for desktop users (including multiple desktops) and a more familiar user interface, though the new Start menu is quite different from the old.Windows Enterprise is not eligible, nor is Windows RT, the ARM version in the original Surface and Surface 2 tablets.