system files in virus chest

just a stupid question, are there a set number of system files that should be in the chest, i originally had 3 files in chest, but now there are 5, and the 2 new ones have the same name as 2 of the older ones, but they were both transfered to the chest on the same day, same time. is this somthing to worry about? i have tried different anti-virus scans and they have found nothing, also ran boot time scan, found nothind, however on the drop down menu, i cannot accsess, status information, last scan results,or view scan reports, do i have a problem?

Probably files were updated (patched) by Windows Updates. New versions were that backups.
Don’t worry about that files… we even don’t know when these backups will be useful anyway…