This is a way out of Microsoft nagging you about downloading the upgrade for Windows 10. How to get rid of the 'reserve your free copy' of Windows 10 notification by uninstalling its Windows Update file, (file KB3035583); to prevent the update from being downloaded, you'll need to switch from automatic to manual updates. Open Windows Update and click 'Change Settings' on the left. From the dropdown menu, select 'Download Updates but let me choose whether to install them' and click OK. Restart your PC and open Windows Update again. Click 'Check for Updates' and you'll see KB3038853 has popped up again. Right-click it and select 'Hide update' to prevent reinstalling it again.
Alternatively, hide the notification icon. Right-click the clock at the bottom right of your Desktop and select 'Customise notification icons'. From the dropdown menu next to GWX, (Get Windows 10), select 'Hide icon and notifications' then click OK.
I got this info from 'Computer Active Magazine'. Hope this will be of help to someone.
