The bad Key log code caused a 2nd problem.
Error message said... License has expired
& the the program terminated.
It made no difference to un-install & re-install.
Avast would NOT run in Demo mode.
A situation I did not enjoy with the customer sitting watching as I had spent several hours attempting to get Avast Home Edition to install & run.
I could not leave the installation without AntiVirus protection, so at 2:45am Australian time, Sunday morning I gave up, installed AVG & left.