@ngrfgt: It is likely that this notification is stemming from a third party app. To test this please restart your device in Safe Mode via the following steps: Turn the device off > Press and hold the Power key > Release the Power key when the device logo appears > Press and hold the Volume Down key immediately after releasing the Power key > Continue to hold the Volume Down button until the device finishes booting. If you notice that the pop ups have stopped in Safe Mode then please restart the device and delete any recently installed third party applications. Sadly there is no way of telling which app the ads are stemming from therefore a little trial and error will be needed. Apologies for any inconvenience this may cause you.