[dayglored]

Here's the official Microsoft page about the full-screen nag:

https://support.microsoft.com/en-us/kb/3173040 - Windows 8.1 and Windows 7 SP1 end of free upgrade offer notification

If you have Windows 8.1 or Windows 7 with Service Pack 1 (SP1), the following full-screen notification might appear on your computer:

This notification is a reminder that the Window 10 free upgrade offer ends on July 29, 2016. Microsoft recommends that you upgrade to Windows 10 before the offer expires. You can choose to upgrade directly from the notification, dismiss the notification permanently, or choose to be reminded later. For more information about the Windows 10 upgrade and how to manage notifications, see the "More Information" section.

This message appears when you unlock Windows through the end of the upgrade offer, and reoccurs three days later if you select the Remind me later option.

Lovely.

[dayglored]

Also from Microsoft's page:

For more information about how to disable Windows 10 upgrade notifications, see http://support.microsoft.com/kb/3080351.

[Zack Attack]

- the most secure Windows ever built -

Yes folks. Want to stop getting those upgrade to Windows 10 nags? Install Windows 10 and it will block those annoying Windows 10 nag screens.