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Some Files Cannot Be Cleaned. Why?
Only
files infected by viruses can be disinfected. Virus will attach itself
to another file and that file can normally be cleaned.
If you
have, e.g. a Trojan, Joke, Worm or Backdoor in your computer, you
may rename or delete the unwanted file but it cannot be disinfected.
Infected files may be
renamed if they cannot be disinfected. The extensions of such files start
with a number (from 0 to 9) as the first character (e.g. VIRUS.0XE,
VIRUS.1XE, HOSTS.0, etc.). To remove these files and other files that
FSAV could not disinfect or delete automatically, please select
"Delete" as the disinfection action for them next time they are detected. The
infected files will be deleted instantly or after system restart.
Instructions on how to delete infected files can be found here.
Warning!
If F-Secure Anti-Virus detects infected messages inside e-mail database
files, do not select "Delete"
or any other disinfection action as you might loose all your e-mails!
These e-mail databases can have .DBX, .PST, or .MBX extension (for
Microsoft e-mail clients Outlook or Outlook Express) or they can be
named as INBOX, SENT, or TRASH (for Netscape/Mozilla e-mail clients).
Disinfection instructions for mailboxes can be found here.
How to remove those files that cannot be cleaned
/ disinfected?
To
remove content that cannot be disinfected (like a Trojan, a Joke, a
Worm and a Backdoor), you may change your Anti-Virus settings to ask
the action after infected file is found. Change "Action to take on
infected files = Ask after scan"
and then scan your computer hard drives. Then if infections are found,
you may select "Delete" for the infected files that you want to remove
permanently.
What to do if in doubt or in case of false alarm?
In case of a false
alarm, it can be dangerous to delete files that were detected as
infected. So if you have a doubt about a certain file detected as
malware, it is better to choose "Rename" as the disinfection action and then to
send the renamed file for inspection to our Viruslab. Please see our guidelines for sending false alarms, virus
samples, hoaxes, and virus-related questions to F-Secure Viruslab.
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