Why do I keep getting this?

[Miqs]

I keep getting this pop up and I don't know why. There is no other computers on my network so why this? I keep changing the name but it still appears.

 

[circatee]

As a test, turn off the WIFI (or disconnect the LAN), restart the unit, and see if it still happens.
This may confirm if something is truly cached, versus it really being an item on the network causing the issue.

Merely my opinion, on how I would troubleshoot this issue...