Scan finds it
Delete should remove it after the PC has rebooted
If your getting reinfected then something you are downloading or some site you go to is reinfecting you. Adwcleaner is just a cleaner not a preventer.
Its also possible the infection could be hiding in system restore files so once cleaned switch off restore - reboot (this will remove all restore points to date)- switch restore back on again to create a new restore point