There is properly a tread about this somewhere, but I can´t find it. 
I just want to know, if it´s safe to open a virus in the chest. Can there be no harm done to the OS.
Why would you want to open a file from the virus chest, it’s there for a purpose to stop it causing harm. The virus chest is effectively a protected area (quarantine) where you can’t do anything with the file other than scan it again with avast.
So why would you want to open a virus ?
There is no rush to delete anything from the chest, they can’t do any harm there. Anything that you send to the chest you should leave there for a week or two. If after that time you have suffered no adverse effects from moving these to the chest, scan them again (inside the chest) and if they are still detected as viruses, delete them.
Sorry. ;D
Maybe it was the wrong question.
I´ll try again. ( But you have already answered it for me )
If virus is removed to chest, then I can´t do anything with it, that can cause any problem to OS. ( Only if I restore it off course )
But I,m curios about this.???
If after that time you have suffered no adverse effects from moving these to the chest, scan them again (inside the chest) and if they are still detected as viruses, delete them.
How could a possible virus change to a " Not a virus " in the chest after say two weeks ???
Oh.
And if it should change to " Not a virus ", can I then restore it safely.
avast detected the file incorrectly as a virus the first time round and after 2 weeks a virus definition update fixed the false detection.
Im not sure if avast rescans infected files in the virus chest after a definition update. Symantec Antivirus 10 prompts the user after an update to re-scan infected files and attempt to clean them.
Someone must be able to answer that.
Lets say I move a virus to chest. Will it be scanned in the chest if I scan my harddrive. And will it show up as secured or something like that.
As DukeNukem points out, it could have been a false positive on the first detection. During the 2 weeks it is safely in the chest, updated virus definitions by then may no long detect it as a false positive virus. If it is no longer detected as a virus after 2 weeks, it should be safe to restore the file.
Of course, if during this 2 week period there have been no adverse effects from the file being out of service, you may not need the file at all … but then again, you might. This might depend on the functions, programs, & actions you have taken on your computer during that 2 week period as it could be possible that you did nothing that might have needed that file. It would be up to you to decide.
I hope this helps you.
Edit:
You can scan files while they are inside the chest.
It is possible that a file could incorrectly be detected as a virus.
If you move that file to the chest it isn’t available to do what it should if called by another process, so you would/should notice an adverse effect of it being in the chest.
If a file if identified as a false positive, the detection of a know program you have used for some time now being detected. It may be a virus but it could also be a false positive so you or others investigate that by scanning with multi AV engines and if it looks like it is an FP they send that to avast and the VPS (virus signature files) is modified.
That is why you first action should never be delete, but move to the chest and leave it there for a few weeks (this allows time for corrective action) before scanning to confirm it is still detected, if so delete it.
If it is no longer detected you can safely restore it from the virus chest to its original location.
Thank you all.
I am aware off the “danger” in deleting any files.
Last question is still standing!
Will a virus in the chest, show up in a “on demand scan” in local drives.
No.
Ok 