Those persistent "Get Windows 10" pop-ups are going away soon, after Microsoft's free upgrade offer for Windows 10 expires on July 29.
During those final days and hours, anyone still running Windows 7 or Windows 8.1 should brace for one last round of upgrade prods from Redmond, including a full-screen message, as the GWX program moves into its final phase.
Two noteworthy additions are visible in the lower-left corner of that screen. Instead of merely dismissing the reminder, you can ask to be notified up to three more times, or you can specify that you've made up your mind and don't want any more notifications.
That "Do not notify me again" message should stop all further upgrade prompts.
You'll also be spared the notification if you previously uninstalled Windows 10, had a failed installation attempt that resulted in a rollback, or your PC has been determined to be incompatible with Windows 10.