As soon as I root out AVG PCTuneUp, I will proceed to uninstall other licenced AVG products on my own and other systems at my school. As an IT teacher, I have previously recommended AVG products to other teachers as well as to students, but I will now advise against using AVG products.
I can't uninstall through the usual Control Panel path, nor by the uninstall manager in the PC TuneUp folder, Windows task manager can't halt its operation, meaning I can't just delete the folder and clean up the leftovers afterwards, Windows Defender informs me that it can't function because of another currently running program; which I suspect is AVG PC TuneUp.
I will never pay another cent to AVG! I have now lost hours trying to uninstall AVG PC TuneUp and its related programs.
I have chatted with an AVG Support representative, who sent me this link for a specific 'PC TuneUp' remover tool, which I have tried to run, but so far has only told me that the uninstall is still in progress and to be patient... that last instruction is a little hard to take after all the frustration caused by AVG.