F-Secure Anti-Virus 5.40 and later versions can detect and rename infected files. It can successfully protect workstations from infection - when the worm attempts to copy a file to startup folder, FSAV will detect and rename that file before it can be activated. FSAV 5.4x also automatically renames backdoors and trojans dropped by the worm.
If you are using FSAV version 5.30 or earlier, then to prevent reinfection in a LAN environment, you might need to take down the network and reconnect machines only once they've been scanned and cleaned if needed. Please note that selection of 'Rename' or 'Delete' disinfection actions might be needed to get rid of worm and backdoor files. In case the infected files are locked, you might need to delete them from pure DOS (in case of Windows 9x systems) or to rename the infected files with different extensions and restart a computer.
Suspect a file is incorrectly detected (a False Positive)?
A False Positive is when a file is incorrectly detected as harmful, usually because its code or behavior resembles known harmful programs. A False Positive will usually be fixed in a subsequent database update without any action needed on your part. If you wish, you may also:
Check for the latest database updates
First check if your F-Secure security program is using the latest detection database updates, then try scanning the file again.
Submit a sample
After checking, if you still believe the file is incorrectly detected, you can submit a sample of it for re-analysis.
NOTE If the file was moved to quarantine, you need to collect the file from quarantine before you can submit it.
Exclude a file from further scanning
If you are certain that the file is safe and want to continue using it, you can exclude it from further scanning by the F-Secure security product.
Note You need administrative rights to change the settings.