the link doesn’t work, i also have a problem of that: periodically, background avast activity load HDD on 100%, or CPU on ~30%;

why does Avast perform any actions that use system resources, without any visible reason, for example the disk waking-up when there was no activity for this disk?

all my friends that do not use avast, do so exactly because it make the system completely unusable for some time – without asking and for no reason.