This is a typical stealth boot sector virus, which beeps and displays this text after every 15 infected floppies:
ystanbulCCC was here! He he
Otherwise the virus just spreads.
IstanbulCCC was reported to be in the wild in the UK in April 1996.
Based on the settings of your F-Secure security product, it will either automatically delete, quarantine or rename the detected program or file, or ask you for a desired action.
Find the latest advice in our Community Knowledge Base.
See the manual for your F-Secure product on the Help Center.
Submit a file or URL for further analysis.