This virus is probably written by the same author as the PSQR variant of the Jerusalem virus, as it checks if that virus is present, when it is run. This virus will overwrite the last 32 bytes of any file it infects, possibly destroying the victim. Prudents activates on May 1st - May 4th of any year, interfering with disk writes.
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.