Many thanks,
seems I am getting somewhere! After reading through some other threads, I reinstalled and now things are moving.
I have got task manager, regedit back…etc…etc and so far…things seem to be ticking.
I still have a problem with the PC not shutting down before, or restarting after the bootscan but at least avast is opening and running.
Am just doing a quick scan then will try another bootscan.
mbam log attached.
Many thanks