O97M ("Office97Macro") is the family name of all Office 97 macro viruses. These viruses are able to infect two or more Office 97 applications. For example, O97M/Tristate is able to infect Word, Excel and PowerPoint files.
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.