igor0
2
The files in Chest are encrypted, so they cannot spread. There is definitelly no problem with keeping “dangerous” files in Chest for a long time. There may be problems if some other viruses were left on your computer (ouside the Chest); you can simply check yourself when you run a scan on your hard disks. If avast! doesn’t find anything, everything is OK. You can simply delete the file from the Chest.
Putting the files command.com, kernel32.dll and wsock32.dll into the Chest is really just a security measure; these files are likely target of a virus infection - and if such a case happened (unlikely, but nothing is 100%, you know), it would be possible to restore them easily.