jakein2008 said:
Hi, thank you for your answer,
but the files is very precious and so big ,it will be a big loss if I
delete it, so should I use it safely?
In all this long thread, you haven't mentioned the *name* of the virus with
which your "precious" file is infected nor have you told us what the file
is; i.e., Word document, Excel spreadsheet, etc.
In the case of some older viruses, only a few bytes of a targeted file were
changed and there was a possibility of altering the bytes in a hex editor
to reclaim the file.
But generally if the file is infected, it is ruined. Delete it and restore
from backup. Don't have backups? Now you know why they are important. When
you get clear of this mess, create and implement a backup strategy.
I would suggest contacting tech support at whatever antivirus company you
use and getting someone advanced (not bottom-tier support) to analyze the
situation for you. This will probably not be free but if the file is really
that precious and you neglected to back it up, it may be your only hope of
resurrecting the file.
Malke