We do need some more information... as far as I see, it is unsuspicious.
Some program wants the "internat.exe" to be added to the autostart. Since there is no such program, nothing will happen. (If you searched your HD thoroughly and have explorer enabled to view system files and hidden files)
Did you install anything prior to the last boot?
When did this happen: first boot after installation of Avast?
Or did it happen all of a sudden without you changing anything knowingly to Avast / Windows / Installations?
Anyway, I would block it and run Malwarebytes Antimalware.