Qualified PCs running Windows 7 and Windows 8.1 show Windows 10 Upgrade notification icon through system tray, Microsoft says this happens automatically (an update installed long time back probably triggers that). By reserving your PC for the upgrade you can confirm your PC is compatible.
What about other users who’ve not seen the icon? This post –we’ve covered 3 methods, we expect at least one method to work with required updates pre-installed — will help you.
What (to do) happens if you don’t see the icon the before July 29,2015 which is Windows 10’s availability date, you’ll see it after that date.
PCs that we determine cannot run Windows 10 will not see the Get Windows 10 app before July 29, 2015. After July 29, 2015, we’ll enable the icon in the system tray. This is to help ensure that you can easily check your PC’s compatibility if you choose.
What do you say on this? Have you seen the icon on your PC?