This virus is designed to activate on July 13th - which happened to fall on a Friday in 1990. It is an encrypted .EXE file infector, which has not been fully dissected yet.
Once detected, the F-Secure security product will automatically disinfect the suspect file by either deleting it or renaming it.
Detailed instructions for F-Secure security products are available in the documentation found in the Downloads section of our Home - Global site.
You may also refer to the Knowledge Base on the F-Secure Community site for further assistance.