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.
Disinfection & Removal
Allow F-Secure Anti-Virus to disinfect the relevant files.
For more general information on disinfection, please see Removal Instructions.