I have set NAV to do weekly scans on my OS 98se. NAV found the following 4 viruses on my machine: attnvg, bm_insta, driverpg and istabm (all with the .exe). These have appeared within the last week. They are now sitting in quarantine. My question is, is it safe to delete these from quarantine and how do I check to see if any damage has been done to my computer?