Hi sony
A bit of advise. Until you are 100% sure that the file is an actual virus and not a false positive, it's safer to just put it into the avast chest.
That's a safe place from where the file can't be accessed by any program. If it should turn out that the file isn't an actual virus, you would then always be able to restore it.
Once you know for sure that it is a virus, you can always delete it from the chest.
I hope that makes things clearer.