To double-check this, run Windows Update and you should see a message in the window that your Windows 10 upgrade has been reserved.
If not, right-click the Get Windows 10 app in the Windows Notification Area and select Check your upgrade status.
I've looked in Properties page for My Computer in the Windows Activation section and it simply says: as suggested in the answers below, but when I do that I get the following error dialog.
Your manufacturer specifically disallowed some models. This is a software configuration issue, and can be solved very easily with registry edit.
Follow these simple steps to solve We’re validating Windows 10 for your PC, and proceed upgrading to Windows 10.
This latter option is the best one, since you can also use it to perform a clean installation of Windows 10 on your PC if you ever need to.
The installation is then pretty straightforward, but you should read our guides to 5 ways to make sure your computer is ready for Windows 10 and How to upgrade to Windows 10 - what to expect from the upgrade process before you begin.
Windows just recently decided that it was no longer genuine and it keeps telling me that I need to re-activate.