F-Secure Anti-Virus 4.01 had a false alarms on SYS.COM and some other common files for "Cryptor-based" virus. To remove this false alarm, download the latest AVP updates from
Once detected, the F-Secure security product will automatically disinfect the suspect file by either deleting it or renaming it.
More information on scanning and removal options available in your F-Secure product can be found in the Help Center.
You may also refer to the Knowledge Base on the F-Secure Community site for more information.