This is a simple boot sector virus. Note that unlike most other boot viruses, Chance infects the DOS boot record (not the MBR) on the hard drive.
Chance activates on the anniversary of John Lennon's death (December 8th), plays a part of the Lennon-McCartney song 'Give Peace a Chance' and displays this text:
All we are saying is give peace a chance (J. Lennon)
Chance was reported in the wild in USA and Canada in December 1995.
Depending on the settings of your F-Secure security product, it will either automatically delete, quarantine or rename the suspect file, or ask you for a desired action.
More information on the 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.