"Move to chest" a.k.a "Virus Vault", or 'Quarantine" on other AV programs, is often the best option. Only choose "Delete" if your AV program gives it as a recommended option. "Move to Chest" is good, because it isolates the file from the rest of the system and any identity with the user is also removed when in the chest. (All files are harmless in the chest.)
Repair or Heal won't work on a Trojan or Rootkit, because the file or nasty program itself is bad, there is nothing to clean. Heal might work for other file formats. Delete should be a last resort unless your software recommends it right away. The file could be a false positive, and if a false positive is deleted, you have removed a good, and perhaps critical file.
What is your line of action for questionable files? Here's mine:
1.) Recommend action from AV program.
If that fails
2.) Move to chest-The chest is nice too, because you can also send the file to the virus lab for further testing, if you think it could be a false positive.
If that fails.
3.) Clean, Heal, or Repair. (Means the same thing.)
If that fails
4.) Delete
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Jack
