similar problem here
I am getting an error that says could not get lock /var/lib/dpkg/lock-frontend. It is held by process 979665 (aptd)
I have tried multiple kills, and the suggestions for this I found before I signed on and nohting I have tried works.. I suspect is it a simple thing but I keep getting told that is not permited or I did not put enough word/letters or hold my mouth right.