What was the virus name/s, what was the filename/s, where it was found
example (C:\windows\system32\infected-filename.xxx)?
As you have said deleting is not the best first action, why access was denied to the chest is strange, often the file can't be moved (or deleted) because it is running and windoes is protecting it. So it is strange not to be able to move it but be able to delete it.
If it was a trojan virus, deletion is not a real problem - Trojans generally can't be repaired (either by the VRDB or avast virus cleaner), because the entire content of the file is malware.