I read the info about beep.sys. However, this doesn't seem to answer the OP question, which was "Hi, is it safe to delete the quarantined items, can't seem to fine out any info how the quarantine tool works." I had the same question. Once MBAB quarantines the files, is it safe to delete them? Is it better to leave them in the quarantine or should they be deleted? I was infected with a particularly annoying Trojan that MBAM handled nicely, even after my paid service was unable to deal with it. Now I have the nasties in my quarantine. Should I just leave them there or should I delete them? What are the pros and cons of the actions? Thanks,